You _______ play on the street.[ ]
A. can't
B. don't
C. not
D. can
答案:A
下列关于采用预制安装法施工桥梁承载结构,叙述正确的有()。
A.构件质量好,尺寸精度高
B.桥梁整体性好,但施工费用高
C.不便于上下平行作业,相对安装工期长
D.减少或避免了混凝土的徐变变形
E.设备相互影响大,劳动力利用率低
During his life time, Edison ______ 1093 inventions.[ ]
A. worked
B. made
C. did
D. gave