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听力原文：W: Air security checks in the airport always make me nervous. I'm worried that I'll set off the alarm because of my jewelry.
M: No, I know I'll set off security alarm for surE.I have a steel plate in my arm from a rugby injury.
Q: Why will the man set off the alarm in the airport?
(17)
A.Because he is wearing jewelry.
B.Because he has keys in his pocket.
C.Because he has a mental plate in his bag.
D.Because he has a steel plate in his body.

A.M:
B.
Q:
C.Because
D.
B.Because
E.
C.Because
F.
D.Because
G.

【参考答案】

D
解析：对话中男士提到他将会因为胳膊内由于受伤所带的金属固定板而触发安全警报器。steel plate意为(固......

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听力原文： Lightning is a flow of electricity formed high above the earth. A single flash of lightning 1.6 kilometers long has enough electricity to light one million light bulbs.The American scientist and statesman, Benjamin Franklin, was the first to show the connection between electricity and lightning in 1752. In the same year he also built the first lightning roD.This device protects buildings from damage by lightning. Modern science had discovered that one lightning contains over 15 million volts. A spark between a cloud and the earth may be as long as 13 kilometers, and travel at a speed of 30 million meters per seconD.Scientists estimate that there are about 2 000 million flashes of lightning per year. Lightning hits the Empire State Building in New York 30 to 48 times a year. In the United States alone it kills an average of one person every day.The safest place to be in case of an electrical storm is in a closed car. Outside one should go to low ground and not under a treE.Also, one should stay out of water and away from metal fences. Inside a house, people should avoid opening doorways and windows and not touching wires or metal things.29. What is the main idea of the passage?30.How many people might be killed by lightning an average week according to the passage?31.Which of the following is a safe place in an electrical storm?(30)A.Benjamin Franklin's lifE.B.Lightning electricity.C.The lightning roD.D.The Empire State Building.

A.6
B.
C.
D.
E.
29.
F.How
G.Which
H.Benjamin
I.
B.Lightning
J.
C.The
K.
D.The
L.

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