One thing that was NOT true about Leonardo da Vinci is that _______.
A. his notebooks were full of his questions
B. he liked telling jokes
C. he enjoyed playing on the building sites
D. he was very skillful at riding horses
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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
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
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