Thank you for _ to my birthday party. [ ]
A. come
B. comes
C. coming
D. came
答案:C
混凝土推定强度fcu,推等于()。
A.fcu,早
B.换算系数×fcu,早
C.换算系数×fcu,28
D.fcu,28
下列用语中,()属于服务禁语?
A、请
B、您好
C、喂
D、再见