Mirages(海市蜃楼) are produced by refraction(折射) of light within a layer(层), or lens(透镜), of air. This layer of air, says meteorologist James. H. Gordon, resists disruption(混乱), even in a fairly strong wind.

Probably the most typical mirage picture is one of a lake in a waterless desert. There may even be the appearance of waves breaking on the shore. The easiest form of mirage to study, however, is one that has been seen by millions of people—those seeming strips(条状) of water on asphalt-surfaced(沥青路面的) highway go suddenly out of sight when one comes near them.

Gordon says Operation Long Distance as the most puzzling of mirage forms, since it  ifies(使无效) a basic law of physics. The law states that the apparent size of an object seems to become smaller as we move away from it; however, this kind of mirage will carry a picture of a ship, a town, or an island a thousand miles and set it up in the sky as big as life.

Mirages may have had an effect on history: a World War Ⅰ story, which has not been really verified(考证), deals with a crucial(决定性的) battle between the Turks and the British. Supposedly, the stronger Turkish army was gaining the advantage when one of its outposts reported British reinforcements(援兵) advancing. After a hurried conference, the Turkish forces withdrew. In reality there were no advancing British troops(军队)—what had been reported was a mirage showing men who were a hundred miles away.

1. The air that carries the mirage acts as 　　　　　　   .

A. a lens　　　　　　　　　　　　　　　　　　　　　　　　　　　　  B. a mirror

C. an absorbent(吸收剂)　　　　　　　　　　　　　　　　　　　　  D. a camera

2. The strips of water are the easiest form of mirage to study because they 　　　　　　   .

A. can be produced in the lab

B. appear quite often

C. have been noted all over the world

D. do not break up in a light gentle wind

3. The passage states that mirages may 　　　　　　   .

A. be reproduced in several places at the same time

B. be enlarged to huge proportions(比例)

C. last for several days

D. be carried a thousand miles

4. The author implies that history might have recorded a different winner in one battle if 　　　　　　   .

A. the Turks had described a mirage correctly

B. British troops had not been advancing

C. a Turkish outpost had not mistaken a mirage for a British advance

D. a British outpost had not reported a distant mirage

 

Mirages(海市蜃楼) are produced by refraction(折射) of light within a layer(层), or lens(透镜), of air. This layer of air, says meteorologist James. H. Gordon, resists disruption(混乱), even in a fairly strong wind.

Probably the most typical mirage picture is one of a lake in a waterless desert. There may even be the appearance of waves breaking on the shore. The easiest form of mirage to study, however, is one that has been seen by millions of people—those seeming strips(条状) of water on asphalt-surfaced(沥青路面的) highway go suddenly out of sight when one comes near them.

Gordon says Operation Long Distance as the most puzzling of mirage forms, since it  ifies(使无效) a basic law of physics. The law states that the apparent size of an object seems to become smaller as we move away from it; however, this kind of mirage will carry a picture of a ship, a town, or an island a thousand miles and set it up in the sky as big as life.

Mirages may have had an effect on history: a World War Ⅰ story, which has not been really verified(考证), deals with a crucial(决定性的) battle between the Turks and the British. Supposedly, the stronger Turkish army was gaining the advantage when one of its outposts reported British reinforcements(援兵) advancing. After a hurried conference, the Turkish forces withdrew. In reality there were no advancing British troops(军队)—what had been reported was a mirage showing men who were a hundred miles away.

1. The air that carries the mirage acts as 　　　　　　   .

A. a lens　　　　　　　　　　　　　　　　　　　　　　　　　　　　  B. a mirror

C. an absorbent(吸收剂)　　　　　　　　　　　　　　　　　　　　  D. a camera

2. The strips of water are the easiest form of mirage to study because they 　　　　　　   .

A. can be produced in the lab

B. appear quite often

C. have been noted all over the world

D. do not break up in a light gentle wind

3. The passage states that mirages may 　　　　　　   .

A. be reproduced in several places at the same time

B. be enlarged to huge proportions(比例)

C. last for several days

D. be carried a thousand miles

4. The author implies that history might have recorded a different winner in one battle if 　　　　　　   .

A. the Turks had described a mirage correctly

B. British troops had not been advancing

C. a Turkish outpost had not mistaken a mirage for a British advance

D. a British outpost had not reported a distant mirage

 

Elderly people who drink several cups of green tea a day are less likely to suffer from depression, probably due to a "feel good" chemical found in this type of tea, Japanese researchers said.

Several studies have    1  drinking green tea to lessening psychological problems and Kaijun Niu, of Tohoku University Graduate School, and colleagues found people    2   70 and older who drank four or more cups of green tea daily were 44 percent   3     likely to experience depression.

Green tea is widely   4    in many Asian countries,  5    China and Japan.

Niu's team   6     1,058 relatively healthy elderly men and women. About 34 percent of the men and 39 percent of the women had symptoms of    7  , according to the study that was   8      in the American Journal of Clinical Nutrition.

A total of 488 participants said they    9    four or more cups of green tea a day, 284 said they downed two to three cups    10   and the rest reported having one or fewer cups daily.

According to the researchers, the    11    effect of drinking more    12    tea on alleviating symptoms of depression did not    13   after they factored in social and economic status, gender, diet, history of medical problems and       14 of antidepressants.

There was no   15    between consumption of black or oolong tea, or coffee, and   16     symptoms of depression.

A green tea component, the amino acid thiamine（硫胺素）, which is   17    to have a tranquilizing（镇静的）  18   on the brain, may  19  the "potentially beneficial effect" shown in the current study, Niu noted,   20   that more study is needed.

(    ) 1. A. linked              B. taken         C. considered               D. regarded

(    ) 2. A. aging                      B. aged          C. years                D. age

(    ) 3. A. more                B. little          C. less                  D. much

(    ) 4. A. sold                 B. planted      C. spread               D. consumed

(    ) 5. A. including          B. concluding C. containing               D. considering

(    ) 6. A. looked for               B. checked     C. investigated      D. asked

(    ) 7. A. optimism          B. happiness   C. bitterness          D. depression

(    ) 8. A. published         B. come out   C. appeared           D. showed

(    ) 9. A. ate                   B. drank               C. swallowed               D. chewed

(    ) 10. A. weekly           B. daily          C. monthly           D. yearly

(    ) 11. A. apparent         B. light          C. huge                D. gentle

(    ) 12. A. black                     B. oolong      C. coffee              D. green

(    ) 13. A. fade                      B. disappear   C. run                  D. decease

(    ) 14. A. influence               B. effect               C. use                   D. result

(    ) 15. A. association      B. use            C. comparison       D. difference

(    ) 16. A. lower             B. increase     C. strengthen         D. cause

(    ) 17. A. assumed          B. thought     C. imaged              D. hoped

(    ) 18. A. effect             B. affect               C. effort                      D. outcome

(    ) 19. A. report             B. confirm     C. complete          D. explain

(    ) 20. A. adding            B. addressing        C. speaking           D. saying

Elderly people who drink several cups of green tea a day are less likely to suffer from depression, probably due to a "feel good" chemical found in this type of tea, Japanese researchers said.

Several studies have    1  drinking green tea to lessening psychological problems and Kaijun Niu, of Tohoku University Graduate School, and colleagues found people    2   70 and older who drank four or more cups of green tea daily were 44 percent   3     likely to experience depression.

Green tea is widely   4    in many Asian countries,  5    China and Japan.

Niu's team   6     1,058 relatively healthy elderly men and women. About 34 percent of the men and 39 percent of the women had symptoms of    7  , according to the study that was   8      in the American Journal of Clinical Nutrition.

A total of 488 participants said they    9    four or more cups of green tea a day, 284 said they downed two to three cups    10   and the rest reported having one or fewer cups daily.

According to the researchers, the    11    effect of drinking more    12    tea on alleviating symptoms of depression did not    13   after they factored in social and economic status, gender, diet, history of medical problems and       14 of antidepressants.

There was no   15    between consumption of black or oolong tea, or coffee, and   16     symptoms of depression.

A green tea component, the amino acid thiamine（硫胺素）, which is   17    to have a tranquilizing（镇静的）  18   on the brain, may  19  the "potentially beneficial effect" shown in the current study, Niu noted,   20   that more study is needed.

(    ) 1. A. linked                  B. taken        C. considered               D. regarded

(    ) 2. A. aging                      B. aged          C. years               D. age

(    ) 3. A. more               B. little          C. less                  D. much

(    ) 4. A. sold                 B. planted      C. spread               D. consumed

(    ) 5. A. including          B. concluding C. containing               D. considering

(    ) 6. A. looked for               B. checked     C. investigated      D. asked

(    ) 7. A. optimism          B. happiness   C. bitterness          D. depression

(    ) 8. A. published        B. come out   C. appeared           D. showed

(    ) 9. A. ate                   B. drank               C. swallowed               D. chewed

(    ) 10. A. weekly           B. daily          C. monthly           D. yearly

(    ) 11. A. apparent        B. light          C. huge               D. gentle

(    ) 12. A. black                     B. oolong      C. coffee              D. green

(    ) 13. A. fade                      B. disappear   C. run                  D. decease

(    ) 14. A. influence               B. effect               C. use                   D. result

(    ) 15. A. association      B. use            C. comparison       D. difference

(    ) 16. A. lower             B. increase     C. strengthen        D. cause

(    ) 17. A. assumed          B. thought     C. imaged              D. hoped

(    ) 18. A. effect             B. affect               C. effort                      D. outcome

(    ) 19. A. report             B. confirm     C. complete          D. explain

(    ) 20. A. adding            B. addressing        C. speaking           D. saying