在实施勘察工作之前,监理工程师应审核勘察单位编制的( )。
A.勘察规划 B.勘察方案 C.勘察管理文件 D.勘察工作责任制
参考答案:B
Many of the audience ______ asleep when they ______ the lecture.[ ]
A. fell; were hearing
B. were falling; heard
C. had fallen; heard
D. fell; had heard
人类遗传病发病率逐年增高,相关遗传学研究备受关注。据以下信息回答问题:
如果Ⅲ-2与Ⅲ-3婚配,生出正常孩子的概率为()