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55._________A. lengthB. dealC. lotD. extent
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55._________A. letsB. allowsC. makesD. leaves
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55._________A. inB. atC. withD. out
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55._________A.Traditionally B.Surprisingly C.Conv
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56._________A.surprised B.surprisingly C.surprise
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化学泡沫灭火器的使用温度范围是________A.-10~55℃ B.-21~55℃ C.4~55
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化学泡沫灭火器的使用温度范围是________A.-10~55℃B.-21~55℃C.4~55℃