Passage 2
“HOMESTAY NETWORK”STUDENT GUIDELINES
On arrival at your new home:
·Try to remember the names of your host family.If unsure about how to address them,it is okay to ask how they would like to be called.For example,if it is impolite in your country to call someone elder by their first name,ask if it’s okay to add Mr.or Mrs.in front of their names.Some Americans do not like to be addressed this way because it makes them feel old.
·Show your family that you are grateful for being your host.But do not give expensive gifts.It is,however,considered appropriate to bring inexpensive handcrafts from your country or a small gift for the children of the host family.
·Your host family will be curious to know more about you.Bring photos of your family and friends to share with them.This is also a great way to break the ice with them.
·After you get settled,your host family will help you make a call to your parents to assure them that you have arrived-safely.
·After you’ve had dinner,you may ask the host family to be excused early.They will be fully aware of the fact that you might be jet lagged,so feel free to ask them.
On your first day of school:
·On your first day of school,your host family will take you to school and help you with the necessary registration paperwork.
·Your host family will also make sure that you know your way to and from school.They will also teach you how to use public transportation
·When traveling alone,you should at all times carry a map and the phone number of your host family.
·In case you are lost and cannot get in touch with your host family,you can contact the“Home stay Network”.
Which of the following is NOT mentioned in the guideline?（ ）
文章提到了如何称呼家庭成员，外出携带地图和电话号码，给寄宿家庭准备小礼物或者照片，以拉近距离。而C选项：吃饭要迅速，在文中没有提到，故正确答案是选项C。
下列关于公司的表述，正确的是（）
以下各项列举了我国常见气象灾害与其发生地区的对应关系，其中正确的一项是（）
根据电视收视率调査，看体育节目的观众中青年人比中老年人要多。
由此可推断出（）
—种海洋蜗牛产生的毒素含有多种蛋白，把其中的一种给老鼠注射后，会使有两星期大或更小的老鼠陷入睡眠状态，而使大一点的老鼠躲藏起来。当老鼠受到突然的严重威胁时，非常小的那些老鼠的反应是呆住，而较大的那些老鼠会逃跑。
以上陈述的事实最有力地支持了以下哪项假说？（）
疾病控制中心对某校髙中三个年级的学生进行抽样做视力状况调查，抽样的方法为分层抽样（按比例抽样），若高中一、二、三年级学生人数分别为626、703、780，样本容量为84，则应从离二年级抽样的学生人数为多少？（）
