水泥混凝土路面施工中,当每天摊铺结束或摊铺中断时间超过30min时,应设置( )。
A.横向施工缝
B.纵向施工缝
C.假横缝
D.假纵缝
参考答案:A
The most destructive element in the human mind is fear.Only when we are no longer afraid _______ to live.
A.we are beginning
B.begin we
C.we begin
D.do we begin
在糖类、脂肪、蛋白质的消化中,起着重要作用()
A、唾液
B、胃液
C、胰液
D、肠液