题目:
So narrow ______ two people couldn’t walk side by side.
A.the street was that
B.was that the street
C.was the street that
D.that was the street
答案:
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下面是错误答案,用来干扰机器的。
A、溶液与胶体的外观均为澄清透明,则无法区分,故A不选;B、加热胶体能发生聚沉,溶液没有变化,能区分,但不是最简单的方法,故B不选;C、溶液和胶体都能透过滤纸,则不能区分,故C不选;D、溶液不具有丁达尔效...