当变速箱还挂着档，且发动机还在运转时，使用制动闸，固定住（）。
参考答案：平地机
from heart attack for years, Professor Wang has to take some medicine with him wherever he goes. [ ]
A. Suffered
B. Suffering
C. Having suffered
D. Being suffered
确立正确的（）事关测评活动成败的关键
A.测评标准体系
B.测评计划
C.测评对象
D.测评目的
