施工班组在每天上岗前进行的安全活动,称为()活动。
A、班前
B、班中
C、班后
参考答案:A
从右栏中找出与左栏相对应的答案。(每小题2分,共20分。)
小题1:Thank you for your help .
小题2:Would you mind opening the window ?
小题3:This is my good friend ,Jack .
小题4:How much are the shoes ?
小题5:What does he look like ?
小题6:What would you like to drink?
小题7:How often do you visit your grandparents ?
小题8:I am hungry .
小题9:The wind won’t last long ,will it ?
小题10:What’s the time ?
A. So am I .
B. It’s three thirty .
C. No ,it won’t .
D. Nice to meet you.E . It’s my pleasure .
F . He is very tall .
G .Twice a month .
H .Coffee ,please .
I . No , not at all .
J .They’re ten dollars .
填砂裂缝支撑剂的性能要求包括()等。
A.悬砂能力强
B.粒径均匀,密度小
C.强度大,破碎率小
D.圆球度高