The substance can be added to gasoline to accelerate the speed of automobiles.

admin2009-06-15  27

问题 The substance can be added to gasoline to accelerate the speed of automobiles.

选项 A、quicken
B、shorten
C、loosen
D、enlarge

答案A

解析 accelerate“加速,促进”,所以A是答案。shorten“缩短,(使)变短”;loosen“解开,放松,松开”;enlarge“扩大,放大”。
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