Popular British author,Charles Dickens′（1812--1870）family could hardly make ends meet.They could only afford to send one of their six children to school.Dickens was not that child.His parents chose to send a daughter,who had a talent for music,to an academy.Then at the age of 12,Dickens′life took another turn for the worse.
His father,a clerk,was placed in prison for unpaid debts.And,being the oldest male left at home,Dickens took up work at a factory.His horrible experience there became the fuel for his future writing.His father was freed three months later and inherited a small amount of money.Dickens was then sent to school.
From 1836 to 1837,he wrote a monthly series of stories.Thus The Pickwick,Papers,came into being,which brought fame to him.
Throughout his career,Dickens covers various situations in his novels.He wrote about the miserable lives of the poor in Oliver Twist,the French Revolution in Tale of Two Cities,and social reform in Hard Times.He also wrote David Copperfield,a book thought to be modeled on his own life.
"I do not write bitterly or angrily,for I know all these things have worked together to make me what I am,"he once said.His difficult childhood did indeed shape the person he became,as well as his writing career.There are shades of young Dickens in many of his most beloved characters,including David Copperfield and Oliver Twist.
Like the author,all these characters come from poor beginnings and are able to rise above their setbacks and achieve success."Minds,like bodies,will often fall into an ill-conditioned state from too much comfort,"he once wrote.On June 9th,1870,aged 58,Dickens died,leaving one unfinished work.The words on his tombstone read:"He was a sympathizer to the poor,the suffering and the oppressed,and by his death,one of England′s greatest writers is lost to the world."
The underlined word"shades"in the passage means
考情点拨：词义猜测题。应试指导：shade的意思为“（人物、事情、时间的）痕迹，影子”，与reminder“使人回忆起某事的事物”意思相近。
把10gMgCl2和MgSO4的混合物溶于适量水中，滴加2mol／L的BaCl2溶液至沉淀完全，共消耗BaCl2溶液25mL。求混合物中MgCl2和MgSO4的质量各是多少克
固定在匀强磁场中的正方形导线框abcd，各边长为1．其中ab是一段电阻为R的均匀电阻丝，其余3边均为电阻可忽略的铜线。磁场的磁感应强度为B，方向垂直纸面向里。现有一与ab段的材料、粗细、长度都相同的电阻丝PQ架在导体框上，如图所示。PQ以恒定速度方向如何
一小物块以速度v0=10m／s沿光滑地面滑行，然后沿光滑曲面上升到顶部水平的高台上，并由高台上飞出，如图所示。问当高台的高度h多大时，小物块飞行的水平距离最大这个距离是多少(g=10m／s2)
某晶体盐的水溶液呈浅绿色，在此溶液中通入氯气，溶液变为棕黄色，把所得棕黄色溶液分成两份：一份加入KSCN溶液，溶液变深红色；另一份加入BaCl2溶液，产生不溶于稀HNO3的白色沉淀，则该晶体盐的化学式是_______。
欲除去乙烷中的乙烯，可将混合气体通过盛有_______的洗气瓶；欲除去乙炔中的硫化氢，可将混合气体通过盛有_______的洗气瓶。
浓硝酸常盛装在棕色瓶中，且贮放在冷暗处，原因是_______，
碳酸氢钠溶液和烧碱溶液反应的离子方程式为_______。
常温下，氨水中存在的离子有_______。
在酸或碱存在的条件下，甲酸甲酯跟水发生水解反应的化学方程式为_______。
有下列几种气体：H2、O2、HCl、NO、NH3、CH4，其中通常情况下能用来和水做“喷泉”实验的是_______。
