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通知发布时间：2005年5月25日内容： 1．下周一，5月30日下午2:00在教学楼205教室召开各班学习委员会议，主题是“如何提高英语口语”。 2．要求每个同学都发言，谈谈自己的想法和经验以及同学学习中存在的问题。 3．欢迎提出宝贵意见和建议。 4．请大家作好准备，准时到会。 5．发布单位：学生会。 Words for reference：学习委员：study monitor 学生会：The Student Union

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[听力原文]11-15A mother and her seven-year-old daughter were resting in their room in a big hotel in Thailand when suddenly a fire broke out. Very soon thick black smoke started to come into their room and there was hardly any air. Their lives were in danger. The mother opened the door only to find that the hall way was also full of smoke. She ran to the telephone to call for help but the line was dead. Then she put wet towel over her daughter’s face and her own so that they could breathe. Later firefighters lowered a rope from the hotel roof to their window level and pulled them up to the roof. Eighty-four people were killed in the fire and fortunately they were saved. In order to breathe, what did the mother put over their faces（）

路基压实度因含水率过大而达不到要求时，应继续碾压。

A. 对
B. 错

The food you eat does more than provide energy. It can have a dramatic effect on your body’s ability to fight off heart disease, cancer, diabetes, high blood pressure, stroke, and weak bones. With remarkable consistency, recent research has found that a diet high in plant-based foods—fruits, vegetables, dried peas and beans, grains, and starchy staples such as potatoes—is the body’s best weapon in thwarting many health-related problems. These foods work against so many diseases that the same healthy ingredients you might use to protect your heart or ward off cancer will also benefit your intestinal tract and bones. Scientists have recently estimated that approximately 30 to 40 percent of all cancers could be averted if people ate more fruits, vegetables, and plant-based foods and minimized high-fat, high-calorie edibles that have scant nutritional value. Up to 70 percent’ of cancers might be eliminated if people also stopped smoking, exercised regularly, and controlled their weight. In the past, researchers had linked fat consumption with the development of cancers, but they currently believe that eating fruits, vegetables, and grains may be more important in preventing the disease than not eating fat. "The evidence about a high-fat diet and cancer seemed a lot stronger several years ago than it does now," says Melanie Polk, a registered dietitian and director of nutrition education at the American Institute for Cancer Research. The road to strong bones is paved with calcium-rich food. Leafy green vegetables and low-fat dairy products are excellent sources of calcium, the mineral that puts stiffness into your skeletal system and keeps your bones from turning rubbery and fragile. Your body uses calcium for more than keeping your bones strong. Calcium permits cells, to divide, regulates muscle contraction and relaxation, and plays an important role in the movement of protein and nutrients inside cells. If you don’t absorb enough from what you eat to satisfy these requirements, your body will take it from your bones. Because your body doesn’t produce this essential mineral, you must continually replenish the supply. Even though the recommended daily amount is 1,200mg, most adults don’t eat more than 500mg. One reason may have been the perception that calcium-rich dairy products were also loaded with calories. "In the past, women, in particular, worried that dairy products were high in calories," says Letha Y. Griffin, M. D. , of Peachtree Orthopaedics in Atlanta. "But today you can get calcium without eating any high-fat or high-calorie foods by choosing skim milk or low-fat yogurt." Also, low-fat dairy products contain phosphorous and magnesium and are generally fortified with vitamin D, all of which help your body absorb and use calcium. If you find it difficult to include enough calcium in your diet, ask your doctor about supplements. They’re a potent way to get calcium as well as vitamin D and other minerals. But if you rely on pills instead of a calcium-rich diet, you won’t benefit from the other nutrients that food provides. Getting the recommended vitamin D may be easy, since your body makes the vitamin when your skin is exposed to the sun’s rays. The underlined word "thwart" (Para. 1) most probably means"______"

A. destroy
B. forbid
C. cure
D. prevent

Directions: Read the following chart and write a composition of about 150 words. The main idea of each paragraph is given below in Chinese.Topic:如何改善美国环境状况。