道路运输行车日志是运输企业加强对驾驶员和车辆动态监管的重要手段。
参考答案：对
—Hi, my name is Jenny. Nice to meet you!
—______.[ ]
A. I am fine.
B. How are you?
C. Nice to meet you, too
D. No, thanks
用于观察肌肉收缩时动作电位的示波器扫描速度为（）。
A.5ms/cm
B.50ms/cm
C.10ms/cm
D.100ms/cm
E.1000ms/cm
