编制施工成本计划时,施工成本包括( )。
A.直接工程费
B.措施费
C.规费
D.企业管理费
E.税金
参考答案:A,B,C,D
句型转换。
1. It started about two days ago. (对划线部分提问)
it start?
2. You are not quiet. I think.(合成一句)
I that you quiet.
3. Something is wrong with my stomach. (同义句转换)
I have .
4. What's wrong with you? (同义句转换)
What's with you?
5. improving, stressed out, I'm, my, English, because, isn't (连词成句)
设α1,α2,α3,α4,β为四维非零列向量,A=(α1,α2,α3,α4),已知方程组AX=β的通解是(-1,1,0,2)T+k(1,-1,2,0)T,其中k为任意实数. (Ⅰ) 问β能否由α1,α2,α3线性表示 (Ⅱ) 求向量组α1,α2,α3,α4,β的一个极大无关组.