氮气中断后,给电子体系统应采取的主要措施是()。
A、停给电子体贮罐搅拌器
B、关闭贮罐氮封氮气阀门
C、关闭计量桶氮封氮气阀门
D、停夹套水
参考答案:B, C
So interested ________ in sunbathing that they often go south with their families on weekends.[ ]
A. is the English
B. the English is
C. are the English
D. the English are
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