71、黑火药主要用于制造( )。

75、Flight delays are often caused by bad weather conditions or mechanical
difficulties.

74、Some of the checked baggage shall be subject to screening before being placed on board an aircraft.

77、I’m glad that you have to stay here for the night, but the airline is responsible for your meals and accommodations.

76、English for the Chinese sentence“别着急,女士,飞机还要15分钟才起飞,来得及。”is “Don’t worry, madam, the plane will depart in 15 minutes, you still have enough time.”

77、If you haven’t got a boarding card and a baggage check,please go to the information counter to go through the check-in procedures first.

76、Even a person joins the crew, he has to go through the pre-boarding security screening procedures.

76、After a passenger checks in for his flight, he has to go through the passport control and security check before boarding.

75、Identity cards can take the place of badges(permits).

86、Even the crew members and their carry-on baggage should go through the security screening procedures.

86、Yogurt is a kind of alcoholic beverage.