【多选题】关于混凝土取样与试块留置的说法,正确的有( )。
A.
用于检查结构构件混凝土强度的试件,应在混凝土运至施工现场后首立方内抽取
B.
当一次连续浇筑超过l000rn3时,同一配合比的混凝土每200ma取样不得少于一次
C.
每一楼层、同一配合比的混凝土,取样不得少于一次
【单选题】现场混凝土试件取样时,留置一组标准养护试件每组不少于()个
【单选题】What war began between the United States and the Soviet Union after World War II?
【单选题】It was in 1939 that __broke out. A. World War Second B. the World War Second C. Second World War D. World War II
【简答题】Which war broke in 1937? The War of Resistance ______.
【简答题】A.The Spanish Civil War. B.The First World War. C.The Second World War. D.The futility of war.
【单选题】Only when______ in 1945 ______to his hometown.
A.
the war war over he returned
B.
was the war over he returned
C.
was the war over did he return
D.
the war was over did he return
【单选题】What war began between the United States and the Soviet Union after World War II?