单选题：What is the writer's advice about alcohol before you give a

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What is the writer's advice about alcohol before you give a speech? A．Drink a little of it to feel all-powerfu
B．Don't drink i
C．Dilute it with wate
D．Drink it two hours before you make a speec

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What does the writer suggest when you feel you are losing yo

What does the writer suggest when you feel you are losing your voice?A．Rest your

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根据材料请回答Look After Your VoiceOften speakers at a meeting expe

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Many young Japanese engineers have been lured(B级)to the Midd

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She exhibited(B级)her paintings at our school．

She exhibited(B级)her paintings at our school．A．examined B．distributed C．collecte

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图像分析的主要方法有（　　）。

图像分析的主要方法有（　　）。 A．对比分析 B．大气校正 C．反差扩大 D．统计分析 E．图像校正

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