沥青路面按照矿料组成不同（强度形成）分为：（）、嵌挤式两种。
参考答案：密实式
Professor Smith has written some short stories , but he is _____known for his plays .
A．better
B．more
C．best
D．most
一般自然磨损可包括（）
A.摩擦磨损
B.磨料磨损
C.粘附磨损
D.疲劳磨损
E.腐蚀磨损
