通读下面的短文，掌握其大意。然后，从每小题的四个选择项中选出可填入相应空白处的最佳选项。
Eleanor Roosevelt was the wife of America’s 32nd president, Franklin Roosevelt. She helped her husband in many ways during his long 21 life. She also became one of the most 22 women in America. She fought for equal rights for all people.
Eleanor was born in New York City in 1884. Her family had great wealth. But Eleanor did not have a happy 23 .Her parents died when she was very young. She was raised by her grandmother. Eleanor 24 that as a child, her greatest happiness came from helping others.
In the early 1900s, many people were worried about the problems of 25 people who came to America in 26 of a better life. Eleanor could not 27 how people lived in such poor conditions while she and some others had so much 28 .
After she finished school, Eleanor began 29 children to read and write in one of the poorest areas of New York City. She also looked into 30 where workers were said to be badly 31 . She saw little children of four and five years old working until they 32 to the floor. She became involved（参与）with other women who 33 the same ideas about improving social conditions.
Franklin Roosevelt began 34 Eleanor when he was in New York. They got 35 in 1905. In the next eleven years, they had six children. The Roosevelt moved to Washington D.C. in 1913.
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考查名词及语境的理解。A．strength力量；B．knowledge知识；C．courage勇气；D．wealth财富。根据上文可知，埃莉诺的家庭非常富有。因此，她与前面的那些生活条件恶劣的人相比，她和其他人拥有太多的财富。故选D。
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_______。
