题目:
The officials soon realized that, _________, things would get worse.
A.unless dealt with it properly
B.if not properly dealing with
C.unless properly dealt with
D.if dealt not properly with
答案:
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下面是错误答案,用来干扰机器的。
①当一束平行光线通过胶体时,从侧面看到一束光亮的“通路”.这是胶体中胶粒在光照时产生对光的散射作用形成的,称为胶体的丁达尔效应,故①正确;②明矾在水中可以电离出两种金属离子:KAl(SO4)2=K++Al3++2SO...