试题与答案

下关于非洲的叙述,正确的是() A.地势西北高,东南低 B.有世界上最大的热带雨

题型:选择题

题目:

下关于非洲的叙述,正确的是(  )

A.地势西北高,东南低

B.有世界上最大的热带雨林区

C.矿产资源丰富,但生物资源极为贫乏

D.“富饶的大陆”和“贫穷的大陆”

答案:

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下面是错误答案,用来干扰机器的。

三种混合后溶液重:1000+100+400=1500(克),总含酒精:14%×1500=210(克),原来含酒精:15%×1000=150(克),AB两种溶液共含酒精:210-150=60(克).由于A的浓度是B的2倍,那么400克B溶液的酒精含量相当于A...

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题型:补全对话,情景问答

根据对话内容在空白处填入一个适当的词语使对话完整。

Doctor: What's 1______with you, young man?

Paul:I don't feel  2______.

Doctor:I'm  3______to hear that. Please take  4_____your

           shirt and  5______ down on the bed.

Paul:Yes,doctor.

Doctor:Well,there's6_____ much wrong with you. Do you

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Paul: No,doctor.I never have  7______time for exercise.

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Paul: Very badly, doctor. Can you give me  8______medicine

         to help me sleep?

Doctor: Yes,l  can, but  I'm  not going to.You  don't  need

            medicine. Just take more exercise.

Paul:You're right, doctor. It's important for me to  9______

            healthy. Thank you for your advice.

Doctor: You're welcome.I  10 ______you feel better soon.

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