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1 .The clock located inside our brains is similar to our bedside alarm clock because ) d9 c) X2 j2 |' A
A it controls when we wake,when we eat and when we sleep.
8 Q6 Z2 D7 q. m+ A n B it has a cycle of 24 hours.
# d% O3 P. _' o. F M% ~, V: e+ n4 k C it is a cycle also called circadian rhythm. & J' e7 i+ p9 s) `6 _0 q9 |/ p, h
D it can alarm any time during 24 hours. % ^% H5 F3 v4 `# k
2. What is implied in the second paragraph?
" r. z1 d+ d/ b A Young children’s biological clock has the same rhythm with that of the teenagers.
7 \, s/ J+ W4 e1 } B People after puberty begin to go to bed earlier due to the change of the biological clock. + k V9 s+ e8 ?2 u1 J1 k
C Children before puberty tend to fall asleep earlier at night than adolescents. * l3 `- x/ k# [* t9 a
D Teenagers go to bed later than they used to due to the light from the computer screen.
2 `# [5 n, m+ i) o 3. In the third paragraph the author wants to tell the reader that
; j: \3 U" S$ _0 l6 ^ A it is natural for teenagers to stay up late and get up late. / Y( E7 ?( a4 _9 g/ E
B staying up late has a bad effect on teenagers’ ability to think and learn.
) v, q( o9 r9 F3 N8 s" S C during puberty most teenagers experience a kind of gray cloud.
) F- f, w% A; I1 S& B D it is hard for teenagers to get out of bed in the morning. 3 z+ k( U& E5 Q1 d) W" O% d' Y" y
4. Which of the following statements is NOT true according to the fourth and fifth paragraphs? - Q5 y5 c, b' J0 s
A Our biological clock resets itself automatically. + P2 n3 P5 V) T' ^
B light gets through our eyes and resets our biological clock. " F8 P9 M7 r& E' T+ Y
C Our internal clock as well as the alarm clock can be reset automatically.
. \7 Q5 [$ Z. s/ Q: r, d D Our internal clock,like the alarm clock,can be reset. 4 ~ h+ S0 ?8 T4 j+ b" f# g
5. According to the last two paragraphs, what did the previous researchers think about the human eye’s light-sensing system?
0 R; k5 g$ _/ e! U A The human eye had two light-sensing systems. www.Examw.com7 X( ?, f8 F% B/ U% m9 u6 I
B The human eye had one light-sensing system.
" k1 h# |' y- S C The human eye could sense the light of day more quickly than the dark of night.
1 d" P: g* [/ `5 g; z D The human eye could reset our internal clocks in accordance with the alarm clocks.
7 I2 @# |3 f! X h ]7 l( V' H 答案与题解:
' \5 {8 F4 u$ s9 \! k- e 1.B 第一段第二句提供了答案。句中的your internal clock 即指a clock located inside our 1 J; E @( Q" R1 q
Brains。 / w s5 {( n) m2 C
2. C 第二段主要内容是告诉读者,过了青春期(puberty),由于生物钟节奏的变化,青少年(adolescents and teenagers)比以前要晚睡几小时。所以C是该段所隐含的内容。 ; _0 n$ _: ?" g
3. B 第三段的最后一句直接给出了答案。 $ E- x, Z3 Q# _: i0 M
4. C 根据第四和第五段的内容,闹钟和生物钟都可以重新设定时间,但生物钟能通过眼睛接 & \3 f. L3 X ]
受的日光来自动调节生理节奏。所以A、B和D都是这两段中所述内容,C是正确选择,因为闹钟不能自动重新设定时间。 1 c/ E) t/ s* c
5.B 问题使用的是过去时,问的是研究者在最新发现(recent discoveries)之前对眼睛感光系统的认识,即,the signals that synchronize the body’s clock were handled through the same 8 R- S/ {; b3 |$ H0 `/ Q
pathways that we use to see (眼睛所接受到的平衡生物钟的光信号同样作用于人类的视觉系统),也就是说,研究者之前认为人类的眼睛只有一个感光系统。但最新发现却是,人的眼睛有两个感光系统。 |