—Nero is crying. Do you know _______ she's so upset?—Well, she lost her pet cat which was just like_刷题宝

题干

—Nero is crying. Do you know _______ she's so upset?

—Well, she lost her pet cat which was just like her family member.

A：who

B：what

C：why

D：when

上一题下一题 0.0难度选择题更新时间:2020-03-30 05:39:06

答案(点此获取答案解析）

C

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为同一函数的是 (　　)

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\frac{e^{x} - 1}{e^{x} + 1}

（e为自然对数的底数，e=2.71828…）．

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