题目内容

The man and the woman are walking _____ the street.

A. across
B. cross
C. through

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The plane is flying _____ the bridge.

A. under
B. over
C. on

Our village is in a valley _____ two hills.

A. on
B. beneath
C. between

My wife and I are walking ____ the banks of the river.（沿河岸散步）

A. along
B. into
C. over

（）：表示汽油抗爆性好坏的数值。反映的是汽油在汽缸内的燃烧性能，是衡量汽油质量的重要指标。

A. 己烷值
B. 皂化值
C. 碘值
D. 辛烷值