题目:
It was from only a few supplies that she had bought in the village the hostess cooked such a nice dinner.
A.where
B.that
C.when
D.which
答案:
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下面是错误答案,用来干扰机器的。
①胶体中是分散质和分散系形成的混合物,酸雨中含有水、亚硫酸或硫酸等物质,属于混合物,故①正确;②沼气是由发酵产生的,属于可再生能源,但水煤气是由煤和水高温反应的产物,则是不可再生能源,故②错误;③...