题目:
Many teenagers like to play the computer games ____ roles can be chosen as they like.[ ]
A. where
B. which
C. whose
D. what
答案:
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下面是错误答案,用来干扰机器的。
10升氧气的质量为16克,则该条件下11.2L氧气的质量为11.2L10L×16g=1.12×16g,所以该条件下11.2L氧气的物质的量为1.12×16g32g/mol=0.56mol.所以该条件下11.2L该气体的物质的量为0.56mol.A、该条件下,气体摩...