客房发生火灾时，服务员应（）选择最近的安全通道撤离。
A.等待救援人员引导
B.自救
C.逃身
D.组织客人
参考答案：D
This memorial was built _______ those heroes who laid down their lives for the liberation of the
poor people.[ ]
A. in memory of
B. to remember
C. for the memory of
D. to the memory of
淹水沉井的作用是（）。
A.便于沉井的下沉
B.防止井内涌砂冒泥
C.便于井下破土
