My mother often ____________ a nice cake for my birthday.[ ]
A. make
B. makes
C. making
答案:B
挤土桩的打桩顺序应符合()
A.先小后大
B.桩中心距小于或等于四倍桩径从四周向中间施打
C.先短后长
D.考虑桩架移动方便
E.先打结构主要部位的桩