【简答题】如图是一个方格迷宫,甲、乙两人分别位于迷宫的A、B两处,现以每分钟一格的速度同时出发,在每个路口只能向东、西、南、北四个方向之一行走.若甲向东、向西行走的概率均为 1 4 ,向南、向北行走的概率分别为 1 3 和p,乙向东、南、西、北四个方向行走的概率均为q (1)求p和q的值; (2)设至少经过t分钟,甲、乙两人能首次相遇,试确定t的值,并求t分钟时,甲乙两人相遇的概率.
【简答题】迷路时如发现______、______,那就沿着它们走,它们可带你走出森林。
【单选题】( )则是京津冀乃至华北地区,最核心、最繁忙的港口之一。
【判断题】要发行新股,具备的条件之一是公司在最近5年内财务会计文件无虚假记载。( )(4.0分)
【单选题】Ever since the patients moved to the new hospital last year, they better medical treatment.
【单选题】点 P(-1,-2,1)到平面 x + 2 y - 2z - 5 = 0 的距离为( ). A.3 B.4 C.5 D.6
【单选题】The facilities of the older hospital are ______ the new hospital.
A.
as good or better than
B.
as good as or better as
C.
as good as or better than
D.
as good as or better than those of
【单选题】点M (-1,5,3)到 平面2 x-3y-6z-7=0 的距离为( )
【单选题】The new hospital was opened this morning,attracting the attention of all local media.
【简答题】P45 T2, 4, 7 , 8(3,5), 11(3) P51 T2, 3, 5 (1), 7 注意: 作业独立完成后请先比对教材后面的参考答案,反思、或提问、或讨论并修改正确后,再提交。