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问题 选择题

下列混合物可直接用过滤的方法进行初步分离的是 [ ]

A、悬浊液

B、乳浊液

C、溶液

D、空气

答案

答案：A

题目分析:

A、悬浊液是固液混合物，可以通过过滤分离，此项正确；
B、乳浊液是液体混合物，里面没有固体，不能用过滤法分离，此项错误；
C、溶液是液体，里面没有固体，不能用过滤法分离，此项错误；
D、空气中没有固体，不能用过滤法分离，此项错误；
故选:A.

单项选择题

Passage twoEducating girls quite possibly yields a higher rate of return than any other investment available in the developing world .women’s education may be unusual territory for economists ,but enhancing women’s contribution to development is actually as much an economic as a social issue .and economics ,with its emphasis on incentives ,provides guideposts that point to an explanation for why so many girls are deprived of an education Parents in low-income countries fail to invest in their daughters because they do not expert them to make an economic contribution to he family :girls grow up only to marry into somebody else’s family and bear children .Girls are thus seen as less valuable than boys and kept at home to do housework while their brothers are sent to school-the prophecy becomes self-fulfilling ,trapping women in a vicious circle of neglect. An educated mother ,on the other hand ,has greater earning abilities outside the home and faces an entirely different set of choices. She is likely to have fewer but healthier children and can insist on the development of all her children ,ensuring that her daughters are given a fair chance .The education of her daughters then makes it much more likely that the next generation of girls ,as well as of boys ,will be education and healthy . The vicious circle is thus transformed into a virtuous circle. Few will dispute that education women has great social benefits.But it has enormous economic advantages as well .Most obviously ,there is the direct effect of education on the wages of female workers.Wages rise by 10 to 20 percent for each additional year of schooling. Such big returns are impressive by the standard of other available investments ,but they are just the beginning .Education women also has a significant impact on health practices,including family planning.

The author argues that educating girls in developing countries is ( )

A．troublesome

B．labor –saving

C．rewarding

D．expensive
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单项选择题

人民警察有下列哪项情形，错误比较严重，又不宜给予行政开除处分的，应当予以辞退( )

A．殴打他人或者唆使他人打人的

B．私自将警械、警服、警衔标志转借、赠送非人民警察的

C．遇事推诿，消极怠工，工作不负责任的

D．因单位调整、撤销、合并或者缩减编制名额需要调整工作，本人拒绝合理安排的
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