电空制动机系统中只要（）电空阀一失电，便有初制动效果。
A、缓解
B、制动
C、中立
D、过充
参考答案：A
--Have you decided where to go today, Alice?
--I feel like _______to the Natural History Museum. Would you like _______with me?[ ]
A. to go ,to go
B. to go, going
C. going, going
D. going, to go
用于生产铂金链条的铂金量通常只有（），其余为铜、钯材料。
A.70%
B.75%
C.80%
D.85%
ecided where to go today, Alice?
like _______to the Natural History Museum. Would you like _______with me?[ ]