During the winter months,the southeast trade winds are().
A. stronger than during the summer months
B. weaker than during the summer months
C. drier than during the summer months
D. wetter than during the summer month
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自动空气开关具有过载、短路和欠电压保护。
A. 正确
B. 错误
对吸毒人员进行人身检查时,检查民警可以是多少人?()
A. 4人
B. 2人
C. 3人
D. 1人
转子串频敏变阻器启动的转矩大,适合重载启动。
A. 正确
B. 错误