单项选择题

The safety factor is primary in all underwater operations.（）

A．perfect
B．the full view
C．maximum
D．principal

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单项选择题
A judgement may be revised or reversed in the light of some particular action.（）

A．changed
B．overtaken
C．resolved
D．resumed
单项选择题
The Basque separatist movement is waging a campaign against the Government.（）

A．conducting
B．planning
C．paying
D．engaging
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