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关于电场强度，下列说法中正确的是[ ]

A．电场中某点的电场强度与试探电荷在该点所受的静电力成正比，与试探电荷的电荷量成反比

B．电场中某点的电场强度，但与试探电荷的受力大小及电荷量无关

C．电场中某点的电场强度的方向就是试探电荷在该点的受力方向

D．公式及对任何静电场都适用

答案

答案：B

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Questions 9-18


·Read the following article and answer questions 9-18 on the next page.

Apples: The Live Longer Fruit


0. Apples have been a product of healthy eating for many years, and the often-repeated line of an apple a day keeping the doctor away is far from a myth. Apples really do have a wonderful variety of nutritional benefits, and are a tasty addition to any diet of good health and longevity. Below is a list of the top five benefits of making apples a standard part of your daily diet.
1. Pectin (果胶) is a source of dietary fiber and a very handy nutrient to have in one’s diet. While it is also found in oranges, plums, and other fruits, apples have the highest concentration of them all. Pectin works to increase the stool’s volume and resistance of fluids and is therefore helpful in treating constipation, diarrhea, and generally improving the health of the bowels (肠) .
2. A study on nutrition and heart disease found that eating three apples a day for three months can help you to drop your cholesterol by at least 20 points. How does this happen Apple pectin, that miraculous source of dietary fiber, helps to draw bad LDL cholesterol out of the system. Not only that, but the antioxidant quercetin(栎皮酮)that is found in apples inhibits the LDL cholesterol from even accumulating in the body’s bloodstream.
3. The high amounts of quercetin, other flavonoids (类黄酮) , and phytochemicals (植物化学 因子) found in this fruit deliver potent antioxidant activity to all who eat an apple, and with that inhibit the actions of free radicals. In addition, the phytochemicals may act against cancer-causing substances, which will likewise help to prevent cancer. This means that apple eating prevents cancer of the prostate (前列腺) and lung, as well as other parts of the body.
4. There may have been many generations of explorers that sought the fountain of youth, but all they had to do was fight the daily stresses of life with a tasty apple! The phytochemicals that come from the bright colors you find in the skins of your favorite apple variety, along with aiding the apple’s ability to lower cholesterol and fight cancer, also inhibits the onset of diabetes, high blood pressure, heart disease, and other conditions that lead to potentially weakening situations in old age.
5. If keeping a full head of hair will help you to age more gracefully, then chow down on some apples. Chinese medicine considers hair loss to be a sign of a reduced kidney essence, and apples are on the list of fruits and vegetables that will help you to restore this essence and nourish the blood that flows to your hair follicles (毛囊) .

Questions 9-13


·For questions 9-13, choose the best title for each paragraph from the box below.
·For each numbered paragraph (1-5). mark one letter (A -G) on the Answer Sheet.
·Do not mark any letter twice.
  • A. Apples lower cholesterol.
  • B. Apples benefit young and old.
  • C. Apples slow the aging process.
  • D. Apples reduce the risk of cancer.
  • E. Apples help to prevent hair loss.
  • F. Apples enrich people’s diet.
  • G. Apples improve the bowels.


Paragraph 5: ______
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选择题

右图为反射弧结构示意图。以下有关反射弧的叙述中错误的是（   ）

A．采摘玫瑰时手被刺扎到会立即缩回，则[3]位于脊髓

B．打预防针时虽感疼痛手却不缩回，则[3]有大脑皮层的参与

C．若此图表示“望梅止渴”的反射弧，则[1]代表眼睛的视网膜

D．若此图表示“闻风丧胆”的反射弧，则[1]代表耳部结构的鼓膜
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