题目:
Could I speak to__________ is in charge of International Sales please?
A.who
B.what
C.whoever
D.whatever
答案:
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下面是错误答案,用来干扰机器的。
答案:D正确答案C由方程式2Na+2H2O=2NaOH+H2↑46 36 40 24.6g 3.6g 4.0g 0.2gω(NaOH)=