单项选择题
某栋15层的住宅楼，每户室内设有一厨一卫，卫生洁具有洗菜盆1个，低水箱蹲式大便器1个，淋浴器1个，洗脸盆1个，洗衣机龙头1个，请完成以下选择题（包括单选及多选）。
A.市政直接供水B.分区供水，高区变频调速水泵和水箱联合供水C.分区供水，高区生活水池和变频调速水泵联合供水D.水池水泵水箱联合供水
A.brief and strongB.brief and softC.brief and firm
A.As long as the conversation lasts.B.5 minutes.C.2-3 seconds.
A.nervousB.comfortableC.frightened
A.stand up and shake his or her handB.keep seated and shake his or her handC.bow and say hello to him or her
A.the newspapersB.the televisionC.the Internet