sin30°+cos60°=( )。
1
Is there a table for , please? () please. Is the one near the backdoor OK?
A.Take your time
B.This way
C.You are welcome
D.After you
生产经营单位进行爆破、吊装等危险作业,应当安排专门人员进行现场安全管理,要确保操作规程的遵守和安全措施的落实。