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【判断题】
整流电路是将交流电变成直流电的电路。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】Men have distinguished themselves from other animals, and in doing so secured their survival by the ability to observe and understand their environment and then either to adapt to that environment or ...
A.
adapt to their environment
B.
control their environment
C.
adapt the environment to their need
D.
observe and understand their environment
【单选题】某电动机的铭牌如图所示,下列说法不正确的是
A.
这是一台三相笼型异步电动机
B.
该电动机的磁极数是 2
C.
额定状态下,该电动机输出的机械功率是 4. 5kW
D.
该电动机的机座长度为中机座
【简答题】数字万用表按便携性可分为
【单选题】What can be inferred about surviving anaphylaxis?
A.
It is impossible for children to survive anaphylaxis.
B.
Only a few people have ever survived anaphylaxis.
C.
Survival depends on immediate medical treatment.
D.
The professor knows someone who survived the disease.
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