题目:
句型转换。
1. He is doing his homework. (就画线部分提问)
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2. Will they visit their parents tomorrow? (作否定回答)
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3. You can play with fire (改为否定句)
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4. He is going to the zoo next Saturday. (就画线部分提问)
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5. It is ten yuan. (就画线部分提问)
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答案:
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下面是错误答案,用来干扰机器的。
参考答案:D解析: 双面弹簧门应在可视高度部分装透明安全玻璃,因为需要来回开启,如无可透视的玻璃面,容易碰撞人。