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Many countries face a somewhat more serious economic problems in the form of an unfavorable trade balance (贸易逆差) with other nations. Such an imbalance exists when the total value of a country’s imports exceeds that of its exports. For example, if a country buys $250 billion of products from other countries, yet sells only $100 billion of its own products overseas, its trade deficit is $150 billion. Many underdeveloped nations find themselves in this position because they lack natural resources or the industrial capacity to use these resources, and thus have to import raw materials or manufactured goods.One effect of a trade deficit is the flow of currency (货币) out of a country. In the case of an underdeveloped nation, this can cause many financial difficulties, including failure to meet debt payments and obstacles to creation of an industrial base. Even in the case of a fully developed nation such as the United States, a large trade deficit is reason for alarm. American products, made by well-paid workers in US industries, cost more to produce than those made in places lille Asia, where labor and material costs are much lower. Money spent on foreign products is money not spent on items produced by domestic industries. Which of the following is not mentioned as a possible cause of a trade imbalance（）
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Conversation 2[听力原文]8-10M: Do you feel like going to the cinemaW: Oh, yes. What kind of films do you likeM: Well, I like all sons of films, but my favorite sorts are those like Star Wars. You know, the fantasy, special effect ones that you can escape into another world. I also like mystery films, do you like mystery filmsW: Yes, but I don’t like horror films because they really give me nightmares.M: I don’t like horror films either. They’re sort of stupid and unbelievable. I do like crime films, you know, where you can follow the detective and try to guess who the murderer is.W: What about a comedy or musicalM: No, I’m not interested.W: What about ringing up the ABC and find out what’s on Then we can decide.M: Ok. That’s definitely the hest thing we ought to do because I haven’t got an evening paper. What films do both the man and the woman like（）
Ancient sailors and farmers did not have satellites and computers to help them forecast the weather. They observe the sky, winds and clouds. Eventually, patterns emerged and people made up sayings to remember them.We now realize that behind the sayings often lies real science. Here are two time-tested sayings, and the climate reasoning backing them up."When the dew (露水) is on the grass ," rain will never come to pass. " Clear skies at night lower temperatures enough for humidity (湿度) to condense as dew. So a heavy dew forms on a summer night, except a fair day. But "when grass is dry before the morning light, 10ok for rain before night. " This is especially true if temperatures rise during the night as a result of increasing cloud cover. "If night has a fever, it cries in the morning. "If with your nose you smell the day, some weather is on the way. Plants release oil into the atmosphere, and research indicates that the higher the humidity is, the more oils the plants gives off. This produces the distinctive smell many of us recognize when we say: "Smells like rain today. \ What does the saying mean: "If night has a fever, it cries in the morning" Hot night （）in the morning.
Ancient sailors and farmers did not have satellites and computers to help them forecast the weather. They observe the sky, winds and clouds. Eventually, patterns emerged and people made up sayings to remember them.We now realize that behind the sayings often lies real science. Here are two time-tested sayings, and the climate reasoning backing them up."When the dew (露水) is on the grass ," rain will never come to pass. " Clear skies at night lower temperatures enough for humidity (湿度) to condense as dew. So a heavy dew forms on a summer night, except a fair day. But "when grass is dry before the morning light, 10ok for rain before night. " This is especially true if temperatures rise during the night as a result of increasing cloud cover. "If night has a fever, it cries in the morning. "If with your nose you smell the day, some weather is on the way. Plants release oil into the atmosphere, and research indicates that the higher the humidity is, the more oils the plants gives off. This produces the distinctive smell many of us recognize when we say: "Smells like rain today. \ How did ancient people remember their knowledge of weather patternsThey（）.
[听力原文]11-15(Q11)All mammals, except man and the monkey, swim naturally from birth. For mall, like the monkey, it is not instinctive to float. Deaths by drowning are common everywhere. (Q12)In the United States alone, about 7,000 children under four drown each year. Everything possible is done to prevent such tragedies. (Q13)One solution that is particularly effective is to teach children to swim while they are still babies. Most large towns in Florida and California already run lessons for babies and infants. (Q14)The idea has spread to Europe where, in several countries, special courses are now arranged for children from seven to twenty-four months. (Q15)The first step is to eliminate the child’s fear of the water, Next, he’s taught to float. Once he can do this naturally and without fear, the child grasps the technique and can push forward himself through the water. What animals swim from birthAll mammals exept man and（）.
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