【填空题】
90.自阀手把常用制动区，BCCP响应___压力变化，机车制动缸压力上升。
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( ) 38. From a dam, people can use the water for ___________.
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( ) 26.With help from a Mr. H, you can__________.
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( ) 27. A PENGO WATCH CONTROL can help you to ______________.
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( ) 28. You can get your Mr. H for___________.
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( ) 29. When was canned food invented?
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( ) 30. After the trip to the Arctic, Clarence Birdseye invented ____________.
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( ) 31. Changes in weather _____________ in Willis Carrier's company.
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( ) 32. According to the passage, which of the following may lead to inventions?
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【单选题】
( ) 33. What is the writer's main purpose（目的）in writing this passage？
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【单选题】
( ) 34. Why did the father not ask his son not to do this and do that？
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【单选题】
( ) 35. What would someone learn from this passage？
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A. A
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【单选题】
( ) 36. What may be the proper Chinese for the underlined part in the passage？
A．闲暇时光 B．学费 C．精神空虚 D．经济不足
A. A
B. B
C. C
D. D
