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　　试卷

　　Questions 1 to 4 are based on the lecture you’ve just heard.

　　1.

　　A) The increase in beachfront property value.

　　B) An experimental engineering project.

　　C) The erosion of coastal areas.

　　D) How to build seawalls.

　　2.

　　A) To protect beachfront property.

　　B) To reduce the traffic on beach roads.

　　C) To provide privacy for homeowners.

　　D) To define property limits.

　　3.

　　A) By sending water directly back to sea with great force.

　　B) By reducing wave energy.

　　C) By reducing beach width.

　　D) By stabilizing beachfront construction.

　　4.

　　A) Protect roads along the shore.

　　B) Build on beaches with seawalls.

　　C) Add sand to beaches with seawalls.

　　D) Stop building seawalls.

　　Questions 5 to 7 are based on the lecture you’ve just heard.

　　5.

　　A) A kind of exchange.

　　B) A kind of business.

　　C) A commercialized exchange.

　　D) An international friendship association.

　　6.

　　A) Free food and lodging.

　　B) Learning English.

　　C) Staying with English families.

　　D) Meeting young people.

　　7.

　　A) Most of them are satisfied.

　　B) Most of them are very happy.

　　C) Most of them are unhappy.

　　D) Most of them are not satisfied.

　　听力原文以及答案:

　　C C B D C D A

　　听力原文：

　　Passage 1

　　Your professor has asked me to talk to you today about the topic that should be of real concern to civil engineers: the erosion of US beaches. Let me start with some statistics. Did you know that 90% of the coast in this country is eroding, on the gulf of Mexico for instance, erosion averages 4 to 5 feet per year. Over the past 20 years, there has been an increase in building along the coast, even though geologists and environmentalists have been warning communities about problems like erosion. Someway communities have tried to protect their building and roads and to build seawalls. However geologists have found that such stabilizing structures actually speed up the destruction of the beaches. These beaches with seawalls, called stabilized beaches, are much narrower than beaches without them. You may wonder how seawalls speed up beach loss. The explanation is simple. If the flow of the beaches is gentle, the water energy is lessened as it washes up along the shore. It is reduced even more when it returns to the sea as it doesn’t carry back much sand. On the other hand, when the water hits the nearly vertical face of the seawall, it goes straight back to the sea with the full force of its energy and it carries back a great deal of sand. Because of the real risk of losing beaches, many geologists support a ban on all types of stabilizing construction on shore lines.

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