影响沥青路面抗滑性能的因素是( )。
A.集料耐磨光性
B.沥青用量
C.沥青含蜡量
D.前三个均是
参考答案:D
-So what have you learned?
-We’ve learnt _______about life in poor areas.
Which of the following is NOT right?
A.a lot
B.a bit
C.a few
D.a little
如果用a表示一个非零自然数,那么a的最小因数是______,最大因数是______.