The power of sleep
While no one knows exactly why you sleep, it’s clear you can’t live without it. Your brain needs sleep to help you pay attention, think of new ideas, and remember what you learn. 36 If you don’t get enough sleep, a school assignment that’s normally easy may feel impossible, or you may feel clumsy playing your favorite sport.
37 Each stage has unique brainwaves that can be measured during a brain test called an EEG(脑电图). Sleep stages repeat throughout the night in 90-minute cycles.
Non-rapid eye movement (NREM) sleep
Stage 1: Light sleep. In this phase, your body gradually relaxes and brainwave activity starts to slow down. If you wake up now, you may not even know you were asleep at all.
Stage 2: True sleep. In this phase, your breathing and heart beat get slower, but waking up is still easy.
Stage 3: Deep sleep. In this phase, your blood pressure and body temperature drop slightly. 38
Rapid eye movement (REM) sleep
This stage comes after stage three and gets its name from the flickering(来回移动的) eye movements that occur here. 39 An EEG shows a brainwave pattern similar to waking. This is the dreaming stage. It’s also the stage that helps you remember what you learn.
Darkness and dim(昏暗的) lights increase production of a powerful brain chemical (melatonin) that makes you feel tired and sleep through the night. But sunshine and bright lights block melatonin production to help you wake up and stay active all day.
Sleep tip: 40 A dim nightlight is fine, but even the light from digital screens can make it hard to fall asleep.
A. Your breathing and heart beat speed up.
B. Different people have different sleep cycles.
C. Sleep has different stages.
D. Your body needs sleep to grow, fix injuries, and fight sickness.
E. Very slow brainwaves take over and it’s hard to wake up.
F. When you go to bed, keep your room dark.
G. If you can, turn on bright lights and open the window.
DCEAF
—Good afternoon. My name is Peter. I’m the general manager of the personnel department. I’ll be interviewing you. Please sit down.
— 61 , Peter. My name’s Jon. Jon Smash.
—Well, Jon, it’s a pleasure to meet you. 62 .
—I’ve been a manager at Nike for over three years. I won manager of the year award two years ago, and I got promoted last August.
—OK. Tell me about yourself…your personality.
— 63 . I think before I act, and if something goes wrong in our company I always remain calm. I never scream at my employees. And I’ve never lost my temper.
— 64 ?
—I think I’m good at solving problems. 65 . I also love challenges. I work well under pressure. When my boss pushes me to finish a project early I always get it done and never complain.
—Jon, you seem like a very good manager. I like your ambition. You’re very confident and motivated. We like that here at Microsoft. Well, our interview is over……
A. I’m glad it’s you who will offer me the opportunity to get the job B. I enjoy approaching problems directly C. Nice to meet you D. What are your strengths E. I owe my success to my employees F. Tell me about your work experience G. I think I’m very level-headed |
61. _______ 62. _______ 63. _______ 64. _______ 65. _______