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【单选题】
()也称短焦距镜头。它视角广、视野大，景深也大。A.
望远镜头
B.
广角镜头
C.
变焦镜头
D.
运动镜头
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反馈参考答案：
举一反三
【单选题】According to the passage, what makes acquisitions easier?
A.
The changing technology employed by the media.
B.
The media's increasing profits in the marketplace.
C.
The ever tougher regulations of the FCC on the media since 1980.
D.
The availability of the media's stocks on stock exchanges.
【单选题】听力原文：M: Grading the papers ought to be easier than ever this year. W: Unless the computer breaks down. What do we learn from the conversation?
A.
The computer needs to be fixed.
B.
It may be difficult to grade this year's papers.
C.
The computer is not put in a safe place.
D.
Some teachers prefer to go over the papers by hand.
【单选题】听力原文：M：If you are not so careless, you can get better scores. W: Come on, easier said than done. Q: What does the woman mean? (17)
A.
The exam was easier than before.
B.
It is hard to get a high mark in the exam.
C.
She is sure that she will do it better in the next exam.
D.
The man got a bad scores.
【简答题】AT89S51 单片机定时器的四种工作方式中,方式 0 为 位计数器,方式 1 为 位计数器
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