题目内容

【题目】下图为水循环示意图,①②③④代表水循环环节。完成下列各题。

1关于①~④环节参与水体总量的表述正确的是

A. ③④之和大于①

B. ①大于②

C. ②大于①

D. ④大于③

2与下渗负相关的是

A. 地下径流B. 地表径流

C. 植被覆盖率D. 蒸发

【答案】

1C

2B

【解析】

③④之和是陆地上降水,①表示海洋上降水,②表示海水蒸发,蒸发海水90﹪降落在海洋上,有约10﹪输送到陆地上。地表径流量越大,下渗量越小。

1关于①~④环节参与水体总量的表述中,③④之和是陆地上降水,①表示海洋上降水,②表示海水蒸发,蒸发海水90﹪降落在海洋上,③④之和小于①,A错。蒸发海水有约10﹪输送到陆地上,②大于①,C对,B、D错。

2与下渗负相关的是地表径流,地表径流量越大,下渗量越小,B对。地下径流与下渗量呈正相关,A错。植被覆盖率高,涵养水源能力强,下渗多,呈正相关,C错。蒸发量越大,下渗减少,D错。

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【题目】

1. Exercise

Studies show that 30minutes of mild exercise a day will increase your life span. This doesn't mean you have to run three miles or start jumping. Simple activities such as walking, gardening or taking exercise classes will work.

2. Enjoy people

Contacts with family and friends help fight life-sapping depression and stress. Studies show that people socialize regularly live longer than loners. Interact daily with family members and friends. If you are isolated, make a point of joining social clubs or church groups so you can laugh and share life's joys.

3. Stay mentally active

This is very important-use it or lose it!People who allow their mental faculties to decline run the risk of shortening their lives through falls and other injuries, and not being able to take care of themselves. Read the newspaper, visit the public library, balance your checkbook without a calculator, and exercise your brain by doing crossword puzzle.

4. Diet

The key words are"high-fiber, low-fat". Cut back on red meat, salt, white flour, white sugar, alcohol and coffee. Start eating a balanced diet including lots of fruit, grains, raw vegetables and nuts.

5. Positive attitude

By approaching life with a positive outlook you increase your chances of living longer. Stay optimistic-always search for the silver lining. Studies show people who see life as an enjoyable challenge, rather than a constant trial, cope better and prolong their life spans.

6. medication mix

As we age, we are more likely to take medications. Sometimes this leads to over-medication, which can be disabling and even deadly. Ask your doctor if the drugs you take are really necessary. Make sure there is no danger of a bad drug interaction from your medication. Used correctly, medicines can help you live longer and more comfortably.

7. Volunteer

Helping others increases your self-esteem and makes you feel like a valuable contributor.

1Which of the following does NOT increase your life span___

A.Staying happy about lifeB.Exercising as much as possible

C.Exercising your brain frequentlyD.Enjoying your social life

2People who do not stay mentally active are more likely to___.

A.become ignorantB.lose their minds

C.shorten their livesD.become slow in movement

3Which of the following is correct about medication___

A.Appropriate medication is necessary.

B.Medication is always helpful to you.

C.Doctors suggest taking expensive medicines.

D.Drugs are unnecessary because of side-effects.

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