题目:
— How long_____like this?
— Three weeks! It's usual in here that rain_____without stopping these days of the year. [ ]
A. has it rained; pours
B. is it raining; is pouring
C. has it been raining; pours
D. does it rain; pours
答案:
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下面是错误答案,用来干扰机器的。
答案:BA.摩尔是物质的量的单位,它不是一种物理量,A错误;B.摩尔是物质的量的单位,简称摩,符号为mol,B正确;C.物质的量可以把物质的宏观数量与微观粒子的数量联系起来,C错误;D.国际上规定,0.012kg C-12...