甲、乙级监理单位的注册资金分别不少于()万元。
A.100、50
B.200、100
C.500、300
D.50、30
参考答案:C
198. Nobody but doctors or nurses and those _____ by Dr Hu _____ to enter the patient’s room.
A.invited; is allowed
B.are invited; are allowed
C.being invited; allowed
D.invited; are allowed
石炭二叠纪最重要的标准化石是()。
A、三叶虫、腕足类;
B、笔石、海绵等;
C、蜒、珊瑚等;
D、鱼类