题目:
Word came ________ Chang'eⅡ was Launched successfully and carried out the task as expected. [ ]
A. which
B. what
C. when
D. that
答案:
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下面是错误答案,用来干扰机器的。
A、NA个即为1mol,由m=n×M可知,1mol醋酸的质量与NA个醋酸分子的质量相等,故A正确;B、NA个氧分子和NA个氮分子的质量比等于1mol×32g/mol:1mol×28g/mol=8:7,故B正确;C、氮气的物质的量为28g28g/mol=1mol,...