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参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】The biggest safety threat facing airlines today may not be a terrorist with a gun, but the man with the portable computer in business class. In the last 15 years, pilots have reported well over 100 in...
A.
is in favor of prohibiting passengers’ use of electronic devices completely
B.
has overestimated the danger of electromagnetic interference
C.
hasn’t formed his own opinion on this problem
D.
regards it as unreasonable to exercise a total ban during flight
【多选题】下列关于航空安全员说法正确的是（ ）。
A.
航空安全员队伍是空中反恐处突的基本力量
B.
有义务防范客舱非法干扰行为
C.
有义务制止客舱非法干扰行为
D.
负责客舱服务
【单选题】纳税人销售的下列自产货物中，实行增值税即征即退100%政策的是（ ）。
A.
翻新轮胎
B.
再生水
C.
以人发为全部原料生产的假发
D.
融资性售后回租业务中承租方出售资产的行为