承台混凝土分层浇筑时，接缝应按（）处理。
A.防震缝
B.沉降缝
C.伸缩缝
D.施工缝
参考答案：D
Our school is ______ a bank. [ ]
A. next
B. next to
C. between
D. between and
一块铁质量是1.97吨，体积是0.25米3，铁的密度是______千克/米3，合______克/厘米3；若将该铁块切去一半，则该铁块的密度为______千克/米3．
