A Biological Clock/ G! M( V* z9 u; u( p# x8 {, f
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.
1 K( j. I0 o; p2 d0 Z, N 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.
+ ~; X4 W2 ]: ^( c 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 U% ~; P/ Q8 e0 T2 ~7 w4 E8 k" b8 s 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.
2 e) T+ P6 P9 U4 y$ ~ 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.
) F1 g1 e! x- T. m; }# z) T3 T 词汇:" P: Y. y1 H4 k% w" h l% C$ R
biological adj. 生物(学)的 migration n.迁徙
: v0 @5 Q- @; T insect n.昆虫 restless adj.焦躁不安的5 }" h' v/ z. |4 {8 N5 H$ J
cocoon n.防护卵袋,茧 contain v.含有
: r5 p- w, J* n$ r1 W fur n.软毛 cell n. 细胞2 w1 @& `- O: S, m) v5 \" [
注释:+ n+ {7 i" v& q4 X; K
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。0 m9 [, d; |8 k) Q4 t4 A3 C
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.
' T( h9 I5 W( |* U! H; E5 D, H4 @/ L* e: b& M 3、 take 作“花费,花去”解时可用于几种不同的句型:$ Y' j3 _: K1 ^0 K' R
It will take me five days to complete the work.: |" p' i) l0 t" n; V7 P
The work will take me five days to complete.
/ D- {! |! `% r2 Z0 V! H To complete this work will take me five days.
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