走行式门式起重机轨道端部应设置（）等安全装置。
A.行程限位
B.车辆止挡
C.减压阀
D.重量限制器
参考答案：A, B
— We decided ______ trees on the hill, but we haven't decided how to get there.
— Let's go by bike, ______? [ ]
A. to plant; shall we
B. to plant; will you
C. planting; shall we
D. planting; won't you
道琼斯欧洲STOXX50指数基准值为（），规定任意一只成分股在指数中的权重上限为（）。
A.100 10％
B.1000 10％
C.100 15％
D.1000 15％
