垫砟起道用石砟采用火成岩材料,其粒径规定范围为()。
A.5~10mm
B.10~15mm
C.8~20mm
D.10~30mm
参考答案:C
下列词语中加点的字,每对读音都不相同的一组是( )
A.裨将/裨益龃龉/沮丧纰缪/未雨绸缪
B.慑服/嗫嚅 跻身/侪辈对峙/有恃无恐
C.绚烂/驯服角色/角逐疏浚/怙恶不悛
D.憔悴/淬火贬谪/嫡系拜谒/残碑断碣
The ticket is on the floor. Please _____ for me. [ ]
A. pick it up
B. pick up it
C. clean it up
D. put it up