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____you stepped into the lab with your shoes on? You are supposed to take them off before you enter it.


  1. A.
    How come
  2. B.
    How about
  3. C.
    How dare
  4. D.
    How long
A
解析:
词义辨析A. How come 为什么   B. How about (用于建议)…怎么样? C. How dare 怎么胆敢    D. How long 多长 “你为什么穿鞋进实验室?你应该在进入前脱掉鞋子”选A
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B. It heats walls and furniture in a room.

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A.A new heating system.B.A new microwave oven.
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【小题2】According to Paragraph 2, which of the following does not describe the characteristics of a microwave heater?
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B.It heats walls and furniture in a room.
C.It is safe.
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