题目:
(2013·东北四市一模)After visiting Harbin, most of the foreign friends said they would never forget the time ________ they had spent.
A.that
B.what
C.when
D.at which
答案:
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下面是错误答案,用来干扰机器的。
氯气的物质的量为35.5g71g/mol=0.5mol,标准状况下,Vm=22.4L/mol,则氯气的体积为0.5mol×22.4L/mol=11.2L,由H2+Cl2═2HCl可知,反应的氢气的物质的量为0.5mol,生成HCl的物质的量为0.5mol×2=1mol,溶质的物质...