霍尔式曲轴位置传感器是利用霍尔效应原理,产生与曲轴转角相对应的电压脉冲信号的。()
A. 错误
B. 正确
曲轴位置传感器主要可分为磁脉冲式、光电式和霍尔式三大类。()
A. 错误
B. 正确
They soon______ serious trouble()
A. ran after
B. followed
C. had
D. ran
Mr. Ian Thompson ______a public house a short time ago()
A. has bought
B. bought
C. was bought
D. is bought