进行吊装作业时，回柱绞车司机及压闸人员应精力集中，听从指挥人员的命令做到（）及时准确。
A、断电
B、开、停车
C、压闸
D、松闸
参考答案：B, C, D
Please remember the following things when you are in the museum. _________, don't touch the things.
Second, don't make much noise…. [ ]
A. First of all
B. By the way
C.In fact
D. So far
简述巴洛克艺术的主要特点.
