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题目内容
（国家开放大学-理工英语2）
According to the research into RSI.s, what can prevent injuries?
选择一项：
A.
New chairs.
B.
Good chairs.
C.
Proper chair height.
选择一项：
A.
New chairs.
B.
Good chairs.
C.
Proper chair height.
参考答案
