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【判断题】
马克思主义现在已经过时了。 正确 错误A.
正确
B.
错误
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举一反三
【单选题】如图 已知 E =12.5 V , R 1 =10 Ω, R 2 =2.5 Ω, R 3 =5 Ω, R 4 = 20 Ω, R =1.5 Ω.利用戴维南定理求: 电阻 R 的电流。
A.
1A
B.
0.71A
C.
0.32A
D.
3A
【单选题】If you sleep less than 7 hours a day, you are more to catch a cold.
A.
possible
B.
certainly
C.
probable
D.
Likely
【简答题】如图 , 已知 E 1 =20V , E 2 =4V , R 1 =10 Ω , R 2 =2 Ω , R 4 =3 Ω , 电压表的读数为了 6V , 试求电阻 R 3 。
【单选题】If you sleep less than seven hours, you are three times more to catch a cold．
A.
possible
B.
certainly
C.
probable
D.
likely
【单选题】If you sleep less than 7 hours a day, you are more to catch a cold.
A.
possible
B.
certainly
C.
probable
D.
likely
【简答题】电路如题图E2—15所示，已知：E1=E2=E3=10 V，R1=2Ω，R2=R3=R4=1Ω， I=10A，求：E=?
【单选题】If you sleep short of 7 hours, you are three times _______ to catch a cold．A．possibleB．certainlyC
A.
25．If you sleep short of 7 hours, you are three times _______ to catch a cold． A．possible
B.
certainly
C.
probable
D.
likely
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