目前建筑施工安全事故中,()所占比例最高.
A.高处坠落事故
B.各类坍塌事故
C.物体打击事故
D.起重伤害事故
参考答案:A
--- I will go to your place at 3:00 tomorrow afternoon.
--- I’m sorry, but I ______ to Beijing by then.
A.am flying
B.have flown
C.will have flown
D.will fly
安全生产中常讲的“三违”指的是什么?