No objections _________ at the time. [ ]
A. raised
B. were raised
C. had
D. took
答案:B
零餐服务中服务员在顾客点完菜后,将一式三联的单据()交收银员。
A.第一联
B.第二联
C.第三联
D.存根联
下列资料中,()不能用来计算地层水电阻率。
A.标准水层孔隙度和电阻率
B.自然电位
C.自然伽马
D.地层水矿化度