现浇混凝土盖梁施工技术要求中,预应力张拉必须做到( )。
A.“三不张拉”B.“五不张拉”C.“六不张拉”D.“十不张拉”
参考答案:C
I'm going to the beach I enjoy . [ ]
A. so; swiming
B. and; swims
C. or; to swim
D. because; swimming
一般情况下,塑性越差的材料越硬。