下列“化学之最”错误的是( )
A:H2是密度最小的气体
B:CH4是相对分子质量最小的有机物
C:H2O是人体中含量最多的物质
D:Fe是地壳里含量最多的金属元素
Michael works _______ a farm. His sister works ____ a factory.
戚继光消灭浙江倭寇的决定性战役是在( )
It was the boy, rather than his brothers, that _________ for what they had done.
商场准备用8000元购进15套西服.可以选购哪一种?( )