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【简答题】
为确定一感性元件的参数,进行如下实验测试:给元件两端加 30V 的直流电压,用直流电流表测得电路电流为 1A ;给元件两端加 50V 的工频交流电压,用交流电流表测得电路电流仍为 1A 。根据以上测试数据确定元件的电阻 R 和电感量 L 。
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【单选题】The national goals for women’t health make it easier to
A.
meet women’S health needs
B.
assess the status of women’t health
C.
solve women’S health problems
D.
deal with the health care crisis
【单选题】The author of the passage thinks that______.
A.
it's much easier to learn a language today than in the past
B.
it's not necessary for many people to learn a foreign language
C.
it's difficult to learn a foreign language
D.
it's not important whether a language is learned quickly or slowly
【单选题】The reason why it is easier to describe a person's personality in words than his face is that ______.
A.
a person's face is more complex than his personality
B.
a person's personality is easily distinguished
C.
people's personalities are very Mike
D.
many words are available when people try to describe one's personality
【单选题】The reason why it is easier to describe a person's personality in words than his face is that
A.
a person's face is more complex than his personality
B.
a person's personality is easily distinguished
C.
people's personalities are very alike
D.
many words are available when people try to describe one's personality
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