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- 31A computer screen may injure your eyes if_____.
A.you sit 60 centimetres away
B.you remember to look away
C.your eyes are too close to it
D.the window is on your left or right
开始考试练习点击查看答案 - 32Hand and wrist injuries are caused when you_____ .
A.get plenty of exercise
B.move in the same way again and again
C.rest your wrists on something
D.keep your elbows as high as the keyboard
开始考试练习点击查看答案 - 33Your eyes and hands will be safe if_____ .
A.you work near a window
B.you often take rests from working
C.you use a keyboard for a long time
D.the window is behind you
开始考试练习点击查看答案 - 34It is good for your back and neck if you sit _____ .
A.in the right way
B.for many hours
C.with the screen below your eyes
D.with your back leaning forward
开始考试练习点击查看答案 - 35What would be the best tide for the text、 _____ .
A.How to protect your eyes
B.How to protect your hands and wrists
C.How to use a computer safely
D.How to protect your back
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