一般工业与民用建筑钢结构的安全等级为下列哪一项？（）
A.一级
B.二级
C.三级
D.不能确定
参考答案：B
We all felt a sense of ________ when we saw so many overseas Chinese coming back safe and sound
from Libya. [ ]
A. security
B. relief
C. emergency
D. achievement
玉米膨制的爆米花
