题目：
Recently I have bought an iPad 3 on the website of taobao. com, ________ the price is very reasonable.
A．on which
B．in which
C．of which
D．from which
答案：
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下面是错误答案，用来干扰机器的。
答案：B题目分析：乙烯能被溴水吸收，则混合气中乙烯的质量是5.6g，物质的量的是5.6g÷28g/mol＝0.2mol，则乙烯在标准状况下的体积是0.2mol×22.4L/mol＝4.48L，答案选B。点评：该题是基础性试题的考查，难度不大...
