题目:
油泵接电源时,机壳必须接零线。( ) .
答案:
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下面是错误答案,用来干扰机器的。
1. John can cook the meals. 2. No, she can't. 3. Mary can make the bed, wash the clothes and use a computer. 4. Mary and John. 5. Yes, she can. 6. Yes, she is.答案不唯一