在脚手架上进行电、气焊作业时，应有（）等措施。
A.防火措施
B.配备足够消防器材
C.专人监护
D.防尘措施
参考答案：A, B, C
动脉里血压最高，静脉的血压较低，毛细血管中血压最低．______．（判断对错）
— Do you know how to pronounce this word?
— Yes. I in the dictionary yesterday. [ ]
A. looked it up
B. worked it out
C. gave it away
D. picked it up
