2. 外语
  3. A lever______a rigid bar that can turn around a fixed point called the fulcrum.

A lever______a rigid bar that can turn around a fixed point called the fulcrum.

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问题 A lever______a rigid bar that can turn around a fixed point called the fulcrum.
选项 A、it consists
B、consists of
C、is consisting
D、can consist
答案B
解析 The verb + preposition structure consist of must come before the object a rigid bar.
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