请根据以上资料，选择以下栏目的正确选项：
“起运国（地区）”栏（）。
A．中国香港
B．英国
C．中国天津
D．伦敦
参考答案：B
It is politely _____ by the hotel management that loud music _____ after 11 o'clock at night. [ ]
A. requested; were not played
B. asked; not to play
C. requested; not be played
D. asked; did not play
下列各项，属于减水剂的是（）。
A.高效减水剂
B.早强减水剂
C.复合减水剂
D.缓凝减水剂
E.泵送减水剂
