(10分)已知数列{an}满足a1=3，an+1= an +2n，
(1)求{ an }的通项公式an；
(2)若bn=n an，求数列{bn}的前n项和sn。
Directions: For this part you are towrite a composition with Dishonesty in Tourism as its title. Your compositionshould have a length of 120 words or so.
根据以下材料，回答
Reading, like all work, has its rules. Aperfect knowledge of a few writers and a few subjects is (51) ________ valuablethan a superficial one of a great many. In one′s reading, great writers of the pastmust be (52) ________ the most attention. Of course it is both natural andnecessary to be familiar with those of the present, for it is among them thatwe are likely to find the friends who have our own anxieties and requirements.But let us not submerge ourselves in a sea of insignificant books; (53)________ (杰作) are already sonumerous that we can never know them all. Let us have faith in the choice ofpast centuries. A man may be wrong; (54) ________ may a generation, buthumanity does not make mistakes. Homer, Tacitus, Shakespeare and Moliere surely(55) d________ their fame. We give them some (56)________ (偏爱) over the writers who have not undergone the test of time.
We must choose our literary nourishmentwell. Each mind requires its own particular food. Let us learn which authorsare our authors. They will be very (57) d________ from those of our friends. In literatureas in love, we are astonished at what is chosen by others. Let us cling to whatsuits us; we are the best judges of(58)________
Whenever possible our reading should bedone in the atmosphere of composure and respect (59) ________ surrounds a fineconcert or a noble ceremony. It is not reading merely to run (60) t________ apage, get up to answer the telephone, pick up a book when one′s thoughts areelsewhere, lay it down until the next day.
第60题答案是
根据以下材料，回答
Reading, like all work, has its rules. Aperfect knowledge of a few writers and a few subjects is (51) ________ valuablethan a superficial one of a great many. In one′s reading, great writers of the pastmust be (52) ________ the most attention. Of course it is both natural andnecessary to be familiar with those of the present, for it is among them thatwe are likely to find the friends who have our own anxieties and requirements.But let us not submerge ourselves in a sea of insignificant books; (53)________ (杰作) are already sonumerous that we can never know them all. Let us have faith in the choice ofpast centuries. A man may be wrong; (54) ________ may a generation, buthumanity does not make mistakes. Homer, Tacitus, Shakespeare and Moliere surely(55) d________ their fame. We give them some (56)________ (偏爱) over the writers who have not undergone the test of time.
We must choose our literary nourishmentwell. Each mind requires its own particular food. Let us learn which authorsare our authors. They will be very (57) d________ from those of our friends. In literatureas in love, we are astonished at what is chosen by others. Let us cling to whatsuits us; we are the best judges of(58)________
Whenever possible our reading should bedone in the atmosphere of composure and respect (59) ________ surrounds a fineconcert or a noble ceremony. It is not reading merely to run (60) t________ apage, get up to answer the telephone, pick up a book when one′s thoughts areelsewhere, lay it down until the next day.
第59题答案是
根据以下材料，回答
Reading, like all work, has its rules. Aperfect knowledge of a few writers and a few subjects is (51) ________ valuablethan a superficial one of a great many. In one′s reading, great writers of the pastmust be (52) ________ the most attention. Of course it is both natural andnecessary to be familiar with those of the present, for it is among them thatwe are likely to find the friends who have our own anxieties and requirements.But let us not submerge ourselves in a sea of insignificant books; (53)________ (杰作) are already sonumerous that we can never know them all. Let us have faith in the choice ofpast centuries. A man may be wrong; (54) ________ may a generation, buthumanity does not make mistakes. Homer, Tacitus, Shakespeare and Moliere surely(55) d________ their fame. We give them some (56)________ (偏爱) over the writers who have not undergone the test of time.
We must choose our literary nourishmentwell. Each mind requires its own particular food. Let us learn which authorsare our authors. They will be very (57) d________ from those of our friends. In literatureas in love, we are astonished at what is chosen by others. Let us cling to whatsuits us; we are the best judges of(58)________
Whenever possible our reading should bedone in the atmosphere of composure and respect (59) ________ surrounds a fineconcert or a noble ceremony. It is not reading merely to run (60) t________ apage, get up to answer the telephone, pick up a book when one′s thoughts areelsewhere, lay it down until the next day.
第58题答案是
根据以下材料，回答
Reading, like all work, has its rules. Aperfect knowledge of a few writers and a few subjects is (51) ________ valuablethan a superficial one of a great many. In one′s reading, great writers of the pastmust be (52) ________ the most attention. Of course it is both natural andnecessary to be familiar with those of the present, for it is among them thatwe are likely to find the friends who have our own anxieties and requirements.But let us not submerge ourselves in a sea of insignificant books; (53)________ (杰作) are already sonumerous that we can never know them all. Let us have faith in the choice ofpast centuries. A man may be wrong; (54) ________ may a generation, buthumanity does not make mistakes. Homer, Tacitus, Shakespeare and Moliere surely(55) d________ their fame. We give them some (56)________ (偏爱) over the writers who have not undergone the test of time.
We must choose our literary nourishmentwell. Each mind requires its own particular food. Let us learn which authorsare our authors. They will be very (57) d________ from those of our friends. In literatureas in love, we are astonished at what is chosen by others. Let us cling to whatsuits us; we are the best judges of(58)________
Whenever possible our reading should bedone in the atmosphere of composure and respect (59) ________ surrounds a fineconcert or a noble ceremony. It is not reading merely to run (60) t________ apage, get up to answer the telephone, pick up a book when one′s thoughts areelsewhere, lay it down until the next day.
第57题答案是
根据以下材料，回答
Reading, like all work, has its rules. Aperfect knowledge of a few writers and a few subjects is (51) ________ valuablethan a superficial one of a great many. In one′s reading, great writers of the pastmust be (52) ________ the most attention. Of course it is both natural andnecessary to be familiar with those of the present, for it is among them thatwe are likely to find the friends who have our own anxieties and requirements.But let us not submerge ourselves in a sea of insignificant books; (53)________ (杰作) are already sonumerous that we can never know them all. Let us have faith in the choice ofpast centuries. A man may be wrong; (54) ________ may a generation, buthumanity does not make mistakes. Homer, Tacitus, Shakespeare and Moliere surely(55) d________ their fame. We give them some (56)________ (偏爱) over the writers who have not undergone the test of time.
We must choose our literary nourishmentwell. Each mind requires its own particular food. Let us learn which authorsare our authors. They will be very (57) d________ from those of our friends. In literatureas in love, we are astonished at what is chosen by others. Let us cling to whatsuits us; we are the best judges of(58)________
Whenever possible our reading should bedone in the atmosphere of composure and respect (59) ________ surrounds a fineconcert or a noble ceremony. It is not reading merely to run (60) t________ apage, get up to answer the telephone, pick up a book when one′s thoughts areelsewhere, lay it down until the next day.
第56题答案是
根据以下材料，回答
Reading, like all work, has its rules. Aperfect knowledge of a few writers and a few subjects is (51) ________ valuablethan a superficial one of a great many. In one′s reading, great writers of the pastmust be (52) ________ the most attention. Of course it is both natural andnecessary to be familiar with those of the present, for it is among them thatwe are likely to find the friends who have our own anxieties and requirements.But let us not submerge ourselves in a sea of insignificant books; (53)________ (杰作) are already sonumerous that we can never know them all. Let us have faith in the choice ofpast centuries. A man may be wrong; (54) ________ may a generation, buthumanity does not make mistakes. Homer, Tacitus, Shakespeare and Moliere surely(55) d________ their fame. We give them some (56)________ (偏爱) over the writers who have not undergone the test of time.
We must choose our literary nourishmentwell. Each mind requires its own particular food. Let us learn which authorsare our authors. They will be very (57) d________ from those of our friends. In literatureas in love, we are astonished at what is chosen by others. Let us cling to whatsuits us; we are the best judges of(58)________
Whenever possible our reading should bedone in the atmosphere of composure and respect (59) ________ surrounds a fineconcert or a noble ceremony. It is not reading merely to run (60) t________ apage, get up to answer the telephone, pick up a book when one′s thoughts areelsewhere, lay it down until the next day.
第55题答案是
根据以下材料，回答
Reading, like all work, has its rules. Aperfect knowledge of a few writers and a few subjects is (51) ________ valuablethan a superficial one of a great many. In one′s reading, great writers of the pastmust be (52) ________ the most attention. Of course it is both natural andnecessary to be familiar with those of the present, for it is among them thatwe are likely to find the friends who have our own anxieties and requirements.But let us not submerge ourselves in a sea of insignificant books; (53)________ (杰作) are already sonumerous that we can never know them all. Let us have faith in the choice ofpast centuries. A man may be wrong; (54) ________ may a generation, buthumanity does not make mistakes. Homer, Tacitus, Shakespeare and Moliere surely(55) d________ their fame. We give them some (56)________ (偏爱) over the writers who have not undergone the test of time.
We must choose our literary nourishmentwell. Each mind requires its own particular food. Let us learn which authorsare our authors. They will be very (57) d________ from those of our friends. In literatureas in love, we are astonished at what is chosen by others. Let us cling to whatsuits us; we are the best judges of(58)________
Whenever possible our reading should bedone in the atmosphere of composure and respect (59) ________ surrounds a fineconcert or a noble ceremony. It is not reading merely to run (60) t________ apage, get up to answer the telephone, pick up a book when one′s thoughts areelsewhere, lay it down until the next day.
第54题答案是
根据以下材料，回答
Reading, like all work, has its rules. Aperfect knowledge of a few writers and a few subjects is (51) ________ valuablethan a superficial one of a great many. In one′s reading, great writers of the pastmust be (52) ________ the most attention. Of course it is both natural andnecessary to be familiar with those of the present, for it is among them thatwe are likely to find the friends who have our own anxieties and requirements.But let us not submerge ourselves in a sea of insignificant books; (53)________ (杰作) are already sonumerous that we can never know them all. Let us have faith in the choice ofpast centuries. A man may be wrong; (54) ________ may a generation, buthumanity does not make mistakes. Homer, Tacitus, Shakespeare and Moliere surely(55) d________ their fame. We give them some (56)________ (偏爱) over the writers who have not undergone the test of time.
We must choose our literary nourishmentwell. Each mind requires its own particular food. Let us learn which authorsare our authors. They will be very (57) d________ from those of our friends. In literatureas in love, we are astonished at what is chosen by others. Let us cling to whatsuits us; we are the best judges of(58)________
Whenever possible our reading should bedone in the atmosphere of composure and respect (59) ________ surrounds a fineconcert or a noble ceremony. It is not reading merely to run (60) t________ apage, get up to answer the telephone, pick up a book when one′s thoughts areelsewhere, lay it down until the next day.
第53题答案是
根据以下材料，回答
Reading, like all work, has its rules. Aperfect knowledge of a few writers and a few subjects is (51) ________ valuablethan a superficial one of a great many. In one′s reading, great writers of the pastmust be (52) ________ the most attention. Of course it is both natural andnecessary to be familiar with those of the present, for it is among them thatwe are likely to find the friends who have our own anxieties and requirements.But let us not submerge ourselves in a sea of insignificant books; (53)________ (杰作) are already sonumerous that we can never know them all. Let us have faith in the choice ofpast centuries. A man may be wrong; (54) ________ may a generation, buthumanity does not make mistakes. Homer, Tacitus, Shakespeare and Moliere surely(55) d________ their fame. We give them some (56)________ (偏爱) over the writers who have not undergone the test of time.
We must choose our literary nourishmentwell. Each mind requires its own particular food. Let us learn which authorsare our authors. They will be very (57) d________ from those of our friends. In literatureas in love, we are astonished at what is chosen by others. Let us cling to whatsuits us; we are the best judges of(58)________
Whenever possible our reading should bedone in the atmosphere of composure and respect (59) ________ surrounds a fineconcert or a noble ceremony. It is not reading merely to run (60) t________ apage, get up to answer the telephone, pick up a book when one′s thoughts areelsewhere, lay it down until the next day.
第52题答案是
