题目内容

He enjoyed walking and crawling through the caves created by huge rocks.

A. 对
B. 错

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He enjoyed the local seafood there.

A. 对
B. 错

Michael was travelling to an island, spending most of the days __.

活塞连杆组由（）等组成。

A. 活塞
B. 活塞环
C. 活塞销
D. 连杆

活塞环包括气环和油环。

A. 对
B. 错