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距离2017年6月大学英语六级考试还有不到一个半月的时间，已经报名的同学备考一定要抓紧，不要临时抱佛脚。新东方网英语六级频道为大家整理了英语六级阅读理解专项训练习题，天天练习考试不担心。
Scientists at Sussex University appear to be on the way to 11 how the
mosquito, carrier of diseases such as malaria and yellow fever, homes in on its
target. The problem is that they have found that the best way to avoid being
bitten is: stop breathing, stop sweating, and keep down the temperature of your
immediate surroundings. 12 the first suggestion is impossible and the others
very difficult.
Scientists have found that there are three 13 stages in a mosquito's
assault. Stage one is at fifty feet away, when the insect first smells a man or
a animal to 14 . Stage two is thought to come into operation about twenty-five
feet from the target, when the insect becomes guided by the carbon dioxide
breathed out by the intended victim. Stage three is when the mosquito is only a
matter of inches from its 15 the warmth and moisture given off by the victim is
the final clue.
The researchers then * 16 how repellents interfere with its three-stage
attack. They found repellents act more subtly than by just giving off a nasty
smell. A Canadian researcher says that repellents appear to 17 mosquitoes first
when it is following the carbon dioxide and second during the final approach,
where the warmth and moisture are the insect's 18 .
Air pervaded by one of the many chemical repellents stops the mosquito
reacting to the victim's carbon dioxide, and the repellent seems to affect the
tiny hairs with which the insect senses moisture in the air. The sensors are
blocked so that the 19 does not know whether it is flying through a moist
current, or
the sensors are made to send the 20 signals.
A. examined
B. animal
C. wrong
D. insect
E. bite
F. Unfortunately
G. inventing
H. distinct
I. prey
J. guide
K. checked
L. definite
M. Unnecessarily
N. confuse
O. discovering
11. O 12. F 13. H 14. E 15. I 16. A 17. N 18. J 19. D 20. C
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发表于 2017-6-12 21:38:19