汽车起重机中，为了防止过卷，设有钢丝绳（）保护装置及报警装置。
A.一圈
B.二圈
C.三圈
D.四圈
参考答案：C
Do you know the stages every inventor must ________ before they can have their invention________ .
A．go through; approve
B．go through; approved
C．get through; approval
D．look through; approved
引起瞳孔散大的原因有()
A．动眼神经损害
B．颈交感神经麻痹
C．抗胆碱药(如阿托品)
D．脑疝
E．强光刺激
