2. 专升本
  3. Generally speaking, all kinds of materials will expand when heated but will______ when cooled.

Generally speaking, all kinds of materials will expand when heated but will______ when cooled.

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问题 Generally speaking, all kinds of materials will expand when heated but will______ when cooled.
选项 A、contrast
B、contract
C、survive
D、return
答案B
解析 通常来讲，物体是热胀冷缩的，contract表示“收缩”。
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