杠杆的种类很多，下列属于费力杠杆的是（ ） A．铡刀 B．开瓶器 C．钓鱼杆 D

阅读《王良与嬖奚（孟子）》，完成问题。

　　昔者赵简之使王良^①与嬖奚^②乘^③，终日而不获一禽。嬖奚反命^④曰：“天下之贱工也。”

　　或以告王良。良曰：“请复之！”强而后可。一朝而获十禽。嬖奚反命曰：“天下之良工也。”

　　简子曰：“我使掌与女乘^⑤！”

　　谓王良，良不可，曰：“吾为之范^⑥我驰驱^⑦，终日不获一；为之诡遇^⑧，一朝而获十。诗云：‘不失其驰，舍矢如破^⑨’，我不贯^⑩与小人乘，请辞！”

【注释】：①王良：春秋末年晋国的一个善于驾车的人。②嬖奚：人名，赵简之的宠臣。嬖（bì）。③乘：驾车。④反命：复命，回来报告。⑤掌与女乘：意思是专门给你驾车。女，同“汝”。⑥范：作动词，按规范去做。⑦驰驱：指赶车。⑧诡遇：打猎时不按照驾车的规矩而与禽兽相遇。⑨不失其驰，舍矢如破：不违背驰驱的法则，放出的箭就能射中。⑩贯，同“惯”。

1．将“我不贯与小人乘，请辞！”翻译成现代汉语。

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2．说说这则寓言故事中的王良是一个怎样的人。

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3．读了这则寓言，你从中受到什么启发？

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数据字典是各类数据描述的集合，它通常包括5个部分，即数据项、数据结构、数据流、 【5】 和处理过程。

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 per 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 p 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 p. 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.

（）percent of all cancers could be averted if people ate more fruits, vegetables, and plant-based foods and minimized high-fat, high-calorie edibles.

A. 30-40

B. 40-50

C. 50-60

D. 60-70

下列（）属于交换机的功能。

A、物理层控制

B、放大信号

C、减少数据发送冲突的发生，避免拥挤，提高网络带宽

D、路由选择

“讨简则功倍力烦，取舍则论甘忌苦”中“论甘忌苦”谓（）

A.无论甘苦

B.有甘有苦

C.义偏在"论甘"

D.义偏在"忌苦"

E.进退两难