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【简答题】
炭疽病人宜采取_________；病原治疗首选_________。
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【简答题】汉乐府诗是按照什么分类编辑的?共有多少首歌诗?
【简答题】How to deall with the dispute concerning the loss or damage7(Suppose you were all arbitrator of the arbitration body，please give your opinion to the case)
【简答题】Suppose you were taken good care of by Aunt Wang when you visited Shanghai where she lived. Write a letter to her to extend your appreciation. Begin your letter as follows: Dear Aunt Wang, You should ...
【单选题】— I ran into ______ back of ______ truck yesterday and damaged my car badly. — I suppose you were driving too fast. [ ]
A.
the; the
B.
a; a
C.
the; a
D.
a; the
【单选题】在纯电阻正弦交流电路中,端电压 V,电阻为10 Ω,若端电压u和总电流i参考方向一致,则有关电流的瞬时值i、有效值相量、有效值I的下列结论,正确的是______
A.
A
B.
A
C.
A
D.
i=22∠0°A
【单选题】You were ________ to close the windows. Why were you so careless? [ ]
A.
allowed
B.
believe
C.
supposed
D.
caused
【单选题】正弦交流电路中的电阻、电感、电容 1 加在一个感抗 XL=10 Ω的纯电感线圈两端的电压 u L =20sin( ω t+30 ° )V, 则通过它的电流是()。
A.
iL=2sin( ω t+30 ° )A
B.
iL=20sin( ω t+30 ° )A
C.
iL=2sin( ω t-60 ° )A
D.
iL=20sin( ω t-60 ° )A
【简答题】在纯电阻正弦交流电路中,已知端电压 V。 电阻 Ω, 那么电流 _________________, 电压与电流的相位差为________________, 电阻上消耗的功率为 _____________ 。
【单选题】在纯电阻正弦交流电路中,端电压u=220 sin ω t V,电阻为10Ω,若端电压u和总电流i参考方向一致,则有关电流的瞬时值i、有效值相量 、有效值 I 的下列结论,正确的是 。
A.
=22A
B.
I =220 sin ω t A
C.
i=22 sinωt A
D.
i=22∠0° A
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