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问题 选择题

下列对氢氧化铁胶体性质的叙述不正确的是

A．能产生电泳现象

B．能产生丁达尔现象

C．能全部通过滤纸

D．氢氧化铁胶体带正电荷

答案

答案：D

A、B、C是胶体的性质，正确，D、不正确，氢氧化铁胶粒带正电荷，胶体不带电。选D。

填空题



After its (1) to the (2) in 2001, China has taken steps towards opening up its (3) . As a condition for joining the WTO, China (4) itself to a (5) of trade liberalization, including the reduction of tariffs on cars and agricultural products. These tariffs reductions are both (6) and there is (7) for China to (8) at a faster pace.
A (9) of (10) and a more rapid and profound reduction of import tariffs would (11) of those Chinese consumers who would (12) imported products at lower prices. Second, a higher (13) into China would take away much upward pressure on the Renminbi and provide a true and lasting (14) to solving current global (15) . Indeed, even a modest (16) in the opening-up process would go a long way towards solving the problem.
The opening up of China’s markets to international competition should (17) deep reforms. Banks should be recapitalized, bad loans provisioned fully and state-owned companies’ runaway indebtedness (18) . Only when real progress in these areas is made should China begin to consider a reform to its (19) . Doing it any earlier would be highly (20) .
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解答题

一个数的因数总比它的倍数小．______．
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