A Biological Clock; c# \3 i# W3 `( u- h& N
Every living thing has what scientists call a biological clock that controls behavior. The biological clock tells _____1___ when to form flowers and when the flowers should open1. It tells _____2____ when to leave the protective cocoon茧 and fly away, and it tells animals and human beings when to eat, sleep and wake.
' M0 H1 J! h- L& A9 | Events outside the plant and animal _____3_____ the actions of some biological clocks. Scientists recently found, for example, that a tiny animal changes the color of its fur ____4_____ the number of hours of daylight. In the short ____5___ of winter, its fur becomes white. The fur becomes gray brown in color in the longer hours of daylight summer.
& N$ ~( C7 |8 O6 d; B- ] Inner signals control other biological clocks. German scientists found that some kind of internal clock seems to order birds to begin their long migration _____6____ twice each year. Birds _____7_____ flying become restless when it is time for the trip, ____8___ they become calm again when the time of the flight has ended.4 s0 l* x6 {& {: V5 h" U
Scientists say they are beginning to learn which ____9____ of the brain contain biological clocks. An American researcher, Martin Moorhead, said a small group of cells near the front of the brain ____10____ to control the timing of some of our actions. These ____11____ tell a person when to _____12_____, when to sleep and when to seek food. Scientists say there probably are other biological clock cells that control other body activities.6 w) S X$ ^9 w; ]
Dr. Moorhead is studying _____13____ our biological clocks affect the way we do our work2. For example, most of us have great difficulty if we must often change to different work hours. _____14____ can take3 many days for a human body to accept the major change in work hours. Dr. Moorhead said industrial officials should have a better understanding of biological clocks and how they affect workers. He said ____15____ understanding could cut sickness and accidents at work and would help increase a factory’s production." y7 B# P2 ?! }6 Y- g- b) \/ j
词汇:" {0 g0 k3 h" _; d& W
biological adj. 生物(学)的 migration n.迁徙* B- c, ?* P+ v$ p1 f1 y! J
insect n.昆虫 restless adj.焦躁不安的
3 Y' p$ Z m. U+ v1 P cocoon n.防护卵袋,茧 contain v.含有* w7 n @3 D% N2 V. f1 @
fur n.软毛 cell n. 细胞
5 T0 Q! _8 X5 H- | 注释:
% u6 V+ \2 [' R3 L" l! p% F 1、 句中谓语动词tells 的宾语有两部分组成。 第一部分是when to form flowers, 是带疑问浮词的动词不定式,第二部分是when the flowers should open, 是名词从句。从修辞上说,两者有些不平衡。! C7 J& o. a& @; [
2、 …the way we do our work 可以理解为中华考试网the way in which we do our work 或the way that we do our work. 实际上,三种说法都成立。如:He speaks English the way the English people do. I don’t understand the way in which he dealt with the matter.
8 w8 b; V8 \2 P 3、 take 作“花费,花去”解时可用于几种不同的句型:( q! n8 o4 _+ \) D
It will take me five days to complete the work.
$ ? I! Q: F+ R7 H% N+ @/ z4 x The work will take me five days to complete.
* r/ o" l% |: } To complete this work will take me five days.
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