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2、近年来受中东战乱以及世界金融危机的影响,世界油价波动变化很大,下列物质受石油价格影响最小的是(   )

A.聚乙烯   B.煤气   C.煤油    D.石蜡

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1、化学在自然资源的开发和利用中具有重要的意义,下列对其认识中不正确的是(   )

A.利用化学知识和化学规律,人们可以更好的开发和利用资源

B.利用化学知识和化学规律,人们可以制取更多物质,丰富物质世界

C.人们在开发和利用资源的过程中,对环境造成了污染,化学对此无能为力

D.人们对资源的开发和利用过程中,时刻不能忘记资源的可持续性发展

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10.(★★★★★)He through the forest alone.

   A.dare walk B.dare to walk

   C.dares walking D.dares to walk

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9.(★★★★★)It’s dark now.We have to stay here for the night, ?

   A.don’t we B.haven’t we

   C.mustn’t we D.shouldn’t we

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8.(★★★★★)You must have seen the film last night, you?

   A.mustn’t B.isn’t

   C.didn’t D.haven’t

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7.(★★★★★)-Do you think he will do me a favour?

   -As far as I know,he is the last one to help others.He be prepared to give you a hand,though. (南京二模)

   A.might B.must

   D.should

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6.(★★★★★)-Are you coming to Jeff’s party?

   -I’m not sure.I go to the concert intead. (2000年高考)

   A.must B.would

   C.should D.might

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5.(★★★★★)I was really anxious about you________ home without a word.

   (2001年高考)

   A.musn’t leave B.shouldn’t have left

   C.couldn’t have left D.needn’t leave

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4.(★★★★★)Better set off at once,________?

   A.won’t you B.shall we

   C.hadn’t you D.wouldn’t you

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3.(★★★★)I’ve tried many times,but the car just________.

   A.won’t start B.wouldn’t start

   C.doesn’t start D.didn’t start

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