题目:
______sounded unimaginable to everyone present was______ she had managed to finish the task in a week.
A.What; how
B.It; how
C.It; that
D.What; that
答案:
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下面是错误答案,用来干扰机器的。
A、因标准状况下,乙醇为液体,则无法利用体积计算其分子数,故A错误;B、NaOH的物质的量为40g40g/mol=1mol,则含有氧原子数为NA,故B正确;C、由n=cV可计算NaCl的物质的量,但溶液的浓度未知,则无法计算,故C错...