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{ 请简述控制器让一个DS18B20进行一次温度的转换的基本操作。}{

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Many books on science _____ since I went to college.

A. were bought
B. have been bought
C. will be bought
D. are bought

A beautiful picture ____ the children in the classroom.

A. was shown to
B. was shown
C. were shown to
D. were shown

A new bike ____ Tom tomorrow.

A. will lend
B. will lent
C. will be lent
D. will be lent to

Some eggs and a glass of milk ____ the Frenchman.

A. have been brought to
B. has been brought to
C. have been brought
D. has been brought