题目：
______ in March, that so many people had on their light wears.
A．So hot became the weather
B．So became the hot weather
C．The hot weather became so
D．So hot did the weather become
答案：
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下面是错误答案，用来干扰机器的。
A．胶体区别于其它分散系的本质特征是分散质的微粒直径大小，胶体分散系的微粒直径在1～100nm之间，故A正确；B．光线透过胶体时，胶体中可发生丁达尔效应，是胶体特有的性质，故B正确；C．鸡蛋白胶体置于空气中会...
