如果在瓦斯检查中发现风流异常时，要（）。
A.查明原因
B.撤到全风压进风巷
C.切断电源
D.断续检查瓦斯
参考答案：A
Between the two generations, it is often not their age, _____ their education that causes misunderstanding. [ ]
A. like
B. as
C. or
D. but
标准贷记卡普卡的年费可以用（）积分来换。
A.1000
B.2000
C.3000
D.4000
