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【判断题】
摩擦性失业和隐性失业属于自愿性失业。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】When do you start eating?
A.
As soon as you arrive at the lunch or dinner.
B.
As soon as everyone is served.
C.
When a speech is being made.
D.
When the host begins eating.
【简答题】有一星形连接的三角对称负载，已知各相电阻6欧，电感25.5毫亨，现接在380伏线电压，频率为50周/秒三相电源上，求通过每相负载的电流和三相平均功率多少？
【单选题】Materials which is applicable to a system as a whole uses zeros in the _______ element(s) of the ASN.
A.
2nd
B.
3rd
C.
2nd & 3rd
D.
1st & 2nd
【单选题】Which of the following materials is a good insulator?
A.
Steel.
B.
Aluminum.
C.
Glass.
D.
Copper.
【单选题】Which of the following materials is a good insulator?
A.
steel
B.
aluminum
C.
glass
D.
copper
【判断题】In Western culture, you can start eating as soon as the food is served in front of you.
A.
正确
B.
错误
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