多项选择题：按照结构形式，物流模型可以分为（）。 A.实物模型 B.图式模型 C.模拟模型 D.

题型：多项选择题

Statistically, air travel is by far the safest way to travel, and you can make flying even safer, just by following these simple rules. As your chances of being involved in an air accident are practically nil（不存在）, many of these tips concern what you should and shouldn't do to make your journey safer when you are airborne（升空的）.

Fly on non-stop routes

Most accidents occur during the takeoff, climb, descent and landing phases of a flight, so flying non-stop reduces your exposure to these complex procedures.

Choose larger aircraft

Although small aircraft have very good safety records, those with more than 30 passenger seats are designed to comply（遵守）with much stricter regulations and are tested more regularly to make sure they still comply. Also, in t he unlikely event of a serious accident, larger aircraft provide a better opportunity for passenger survival.

Pay attention to the pre-flight safety briefing

The information may seem repetitious（重复的）, but it's worth listening to the flight attendants. And even if you’ve flown before, it doesn’t mean you know everything about the aircraft you're on, such as the location of the closest emergency exit.

Store things safely

Never put very heavy articles in the overhead storage bins. They may fall out when someone opens the bin and cause injury. Also, the bin may not be able to hold heavier objects during turbulence（气流）.

Keep our seat belt fastened while you are seated

Cabin crew always tell you this, but it’s important. You would be seriously injured if the plane hits unexpected turbulence. Always fasten your seat belt if you are told to. The general rule of flying is this: If you are told to do something, do it first and ask questions later.

Let the flight attendant pour your hot drinks

Flight attendants are trained to handle hot drinks like coffee or tea in a crowded aisle on a moving aircraft, so allow them to pour the drink and hand it to you. Never ask to take a coffee pot from one of them.

小题1:Whom is the passage meant for?

A．Pilots.

B．Flight attendants.

C．Passengers.

D．Airlines.小题2:The underlined word “those” in the second tip refers to”______” .

A．smaller planes

B．passengers

C．larger aircrafts

D．safety records小题3:What does the author really mean by saying “Cabin crew always tells you this, but it’s important.” In the 5^th tip?

A．Many people don’t pay enough attention to fastening their seat belt.

B．All passengers are glad to accept the crew’s advice.

C．The crew are very responsible.

D．There is no need to remind people to fasten their seat belt.小题4:Which of the following is not true according to the passage?

A．Larger planes have more safety checks and are safer.

B．Take-offs are safer on non-stop flights than landings.

C．Every aircraft is different, so the safety procedures may be different.

D．Seat belts should be worn to protect against turbulence.小题5:The best title of the passage should be”_____”.

A．The safest way to travel

B．Air safety tips

C．Non-stop routes

D．How to fly a plane

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按照结构形式，物流模型可以分为（）。 A.实物模型 B.图式模型 C.模拟模型 D.

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