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【单选题】
晶体三极管工作在放大状态时,应满足( )。A.
发射结、集电结均正偏
B.
发射结、集电结均反偏
C.
发射结正偏、集电结反偏
D.
发射结反偏、集电结正偏
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举一反三
【单选题】An attempt on the part of the author of this passage to give a more informal tone to his writing occurs in ______.
A.
paragraph 2
B.
paragraph 4
C.
paragraph 5
D.
paragraph 7
【单选题】W hat is the tone of the passage? ________.
A.
satirical.
B.
humorous.
C.
critical.
D.
unclear.
【单选题】W h ich sentence below shows a confident tone?
A.
The audit was performed by a certified accountant.
B.
All agenda items for the meeting were selected by the human resources department.
C.
The report was written by George and was approved by the district manager.
D.
The president will give the top sales representative an award at the dinner this evening.
【单选题】8)The tone of this essay is_________.
A.
calm and objective(客观的)
B.
serious and thought-provoking(发人深省的)
C.
humorous and satirical(讽刺的)
D.
sentimental(感伤的) yet philosophical (富有哲理性的)
【单选题】听力原文：W: What do I do after I put the money in ? M: Listen for the dial tone, Jane, and then dial the number you want. Q: What is Jane learning to use? (4)
A.
A television set.
B.
A washing machine.
C.
A public telephone.
D.
A candy machine.
相关题目：
【单选题】W hat is the tone of the passage? ________.
A.
satirical.
B.
humorous.
C.
critical.
D.
unclear.