题目：
____ about the man wearing sunglasses during night that he was determined to follow him．
A．So curious the detective was
B．So curious was the detective
C．How curious was the detective
D．How curious the detective was
答案：
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下面是错误答案，用来干扰机器的。
答案：A题目分析：A项：出现红褐色沉淀是因为FeCl3溶液和NaOH溶液发生复分解反应而生成的，与胶体的性质无关。故选A。点评：本题考查胶体的性质，胶体的主要性质有：（1）丁达尔现象：当一束平行光线通过胶体时，...
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