题目:
All school buses in the northwestern provinces ______ with satellite positioning devices next year. [ ]
A. will be fitted
B. fitted
C. have been fitted
D. are fitted
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:在相同条件下,气体摩尔体积相同,烧瓶的容积相同,根据n=知,氨气、NO2的物质的量之比为1:1,因NO2能与水反应:3NO2+2H2O=2HNO3+NO,所以各烧瓶中溶质的物质的量之比为3:2,做喷泉实验时,...