Great thinkers are often considered to be strange and silly because _______.
A. they have strange living habits
B. their ideas seem strange and frightening
C. they have unusual characters
D. they behave in strange ways
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According to the text, travel is good in that it brings people _______.
A. great fun
B. good health
C. rich experiences
D. new and fresh ideas
Your mind will work most efficiently if you _______.
A. take exercise regularly
B. use your mind more often
C. have a healthy body
D. have enough time to rest
传感器一般由敏感元件、（）、转换电路三部分组成
A. 弹性元件
B. 检测电路
C. 转换元件
D. 放大电路
精密度可以表征测量值的分散程度，反映了测量值的（）误差的影响。
A. 系统
B. 随机
C. 粗大
D. 综合
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