单项选择题

SECTION A CONVERSATIONS In this section you will hear several conversations. Listen to the conversations carefully and then answer the questions that follow. Questions 1 to 3 are based on the following conversation. At the end of the conversation, you will be given 15 seconds to answer the questions. Now listen to the conversation. What is the conversation mainly about

A．An exhibition on some famous people.
B．A course on photography the woman is taking.
C．An exhibition of a famous art historian’s works.
D．An exhibition of a great photographer’s works.

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[听力原文]Airplane EnginesIn 1945 a new type of airplane engine was invented. It was much lighter and more powerful than earlier engines, and enabled warplanes to fly faster and higher than ever. This type of engine was called the jet engine because it blows a large jet of hot air backwards at high speed. The first airplane to use the new jet engine was built in Britain and it began carrying passengers in 1952. It had two jet engines and flew much higher than petrol-engine airplanes. At this height the air is thinner and very cold, and so the airplane can cut through the air more easily. However, the cabin has to be air-conditioned and has to be at normal pressure so that the passengers may eat, read and sleep in comfort. Today all long-distance airplanes have jet engines. The modern jet airplanes are very big and can carry hundreds of passengers on two different floors, which makes air travel much cheaper.

单项选择题

What qualifies a country for financial aid from IDA

A．A per capita income of more than $730.
B．A per capita income of less than $410.
C．A per capita income of more than ∮2,100.
D．A per capita income of less than $730.

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