题目内容

红色是主动地，是动态的。

A. 对
B. 错

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无穷小量的倒数是无穷大量。

A. 对
B. 错

This _________ helps you to burn off fat and tone muscles.

A. workout
B. work out
C. workedout
D. worked out

Community service is seen as the only credible __________ to imprisonment.

A. alternative
B. alternatively
C. alternatives
D. alternate

The work was carried out at __________ cost.

A. minimal
B. minimals
C. a minimal
D. a minimals