《收费公路管理条例》规定经营性公路建设项目应当向社会公布,采用()方式选择投资者。经营性公路由依法成立的()建设、经营和管理。
参考答案:招标投标、公路企业法人
若方程ay-1=0与y-2=-3y解相同,则a=______.
You________ the work better, but you didn’t put more efforts to it.
A.must have done
B.can have done
C.should have
D.could have done