罩面
参考答案:
在原有路面上加铺一层水泥混凝土或沥青混凝土的面层,以恢复路面被磨耗及表层轻度破损的措施。
—__________ have you been in the sports club?
—Since the first month I came to the school.
A.How old
B.How long
C.How much
D.How soon
某口井在钻井过程中的钻头程序应是()。
A.445×215×311(mm)
B.215×311×445(mm)
C.445×311×215(mm)
D.311×215×445(mm)