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问题 单项选择题

已知，在标准条件下反应，zn+Cu2+=Zn2++Cu的Eθ值为（）。

A.+1.103V

B.+0.423V

C.-1.103V

D.-0.423V

答案

参考答案：A

解析：

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句型转换

句型转换。

1. The students are listening to the teacher. (对画线部分提问) 

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2. What is the weather like? (同义句) 

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3. He sleeps nine hours every night. (对画线部分提问)

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4. We don't play soccer every day.  (用now 改为现在进行时) 

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5. She does her homework in the evening. (改为否定句) 

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