车速传感器主要有（）、（）、（）、（）等四种类型四种类型。
参考答案：舌簧开关式、磁阻元件式、磁电脉冲式、光电式
—Could you please tell Peter that I want to talk to him?
—Sure.I will let him know as soon as he ________ back.[ ]
A. comes
B. came
C. has come
D. will come
公安决策为什么需要马克思认识论作指导？
