提高()的强度和稳定性,可以适当减薄路面的结构层,从而降低造价。
A.路面
B.路基
C.面层
D.基层
参考答案:B
_______ to carry out the plan in time, they will make careful preparations.
A.Determine
B.Determined
C.Having been determined
D.Being determined
6名同学站成一排合影,若甲乙两名同学之间恰有两名同学,共有______种不同的排法.