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【单选题】
在如图所示稳压电路中,已知三极管的管压降 U CE > 3V 时才能正常工作,试问: U I 至少应为多少伏A.
21V
B.
18V
C.
30V
D.
6V
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举一反三
【简答题】Our school has a big library. We often go there. Today is Sunday. Lily and I are in the library. In the library there are some signs on the wall. The signs mean (意思是) different (不同的) things. We know t...
【简答题】Here are the twin sisters, Lily and Lucy. They are in Miss Gao’s class. They are two new students. They’re eleven. This is their room. It’s a nice room. There are two beds in the room. One is Lucy’s a...
【判断题】John and Lily are not in the town this weekend because they have gone out for a trip.
A.
正确
B.
错误
【单选题】– Are the books , Lily and Lucy? – No. are in the classroom.
A.
your; Our
B.
yours; Our
C.
your; Ours
D.
yours; Ours
【简答题】完形填空。 Lucy and Lily are sisters. They are in the same (相同的) school and 1 in the same class. Lily is a good student. She 2 hard and all her teachers like her. 3 Lucy doesn't like to study. She isn't go...
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