想实现绕组连接方法的自动改变,可以在控制电路中接入____电器元件。
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At least 5000 people were killed, and that's aconservative ______.
A. estimate
B. arithmatic
C. campaign
D. applaud
There may be some _____ changes to the schedule.
A. tricky
B. minor
C. ultimate
D. original
During his election ______ he promised to put the economy back on its feet.
A. estimate
B. trick
C. campaign
D. reflection
A new report suggests that chewing gum may be a health _____.
A. version
B. hazard
C. origin
D. author