英语四级阅读练习题答案讲解
英语四级阅读练习题原文:
英语四级阅读练习题目:
A) an irregular aspect. B) a regular aspect C) a punctual aspect D) a similar aspect
27.Stage 4 sleep lasts ____.
A) about 80 minutes
B) about 40 60 minutes
C) about 30 munutes
D) about 20 40 minutes
28.The brain waves are the slowest during ____.
A) stage 1 C) stage 4 B) stage 2 and stage 3 D) REM sleep
29.In the second paragraph the word “dart” means ____.
A) glare B) move rapidly or suddenly C) stop moving D) gaze
30.One of the features of REM sleep is that ____.
A) there are large slow waves, though rapid for the first few minutes
B) you have the deepest sleep
C) there are no brain waves
D) the brain waves are a little fast and the brain becomes a little active
英语四级阅读练习题答案讲解:
26.答案B。文章的第二句告诉我们睡眠的不同阶段是周期性发生的,故睡眠的各阶段呈现规则的一面。
27.答案D。根据文章可知一个睡眠周期大约是 80分钟,而stage 4 sleep是睡眠的最后阶段,它发生在入睡后大约40至60分钟时,据此可推出stage 4 sleep持续20至40分钟。
28.答案C。文章第一段倒数第四句说“睡得越深,脑电波就越慢”,而 stage 4 sleep 是睡得最深的,故脑电波也是最慢的。
29.答案B。dart的后文说“眼睛好像看着发生在眼前的事”,又说“这种快速移动眼睛的阶段叫 REM sleep”,据此可知dart意为move quickly or suddenly(飞快地移动)。glare怒目而视;gaze凝视。
30.答案D。从第二段第一、二句可知大脑运动水平会再度略有提高,而 delta波消失, 取代的是脑电波运动图形。据此可知脑电波变得快了一点,大脑活跃些。而大的缓波和睡得 最深是 stage 4 sleep的特征,rapid for the first few minutes是stage 1 sleep的特征,整个睡眠阶段都是有脑电波的,故A,B和C皆错。
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