已知A(-4,0),B(2,0)以AB为直径的圆与y轴的负半轴交于C,则过C点的圆的切线方程为( )。
选择括号内适当的单词填空。
1. David and I (am/are) in the same class. David (likes/is liking)making model planes, but I
(don't like/don't).
2. Mr Black is my (first/the first) PE teacher. He is (the best/better) in our school.
3. Let the old woman (gets on/get off) the bus first.
4. The (Australia/Australian)man is coming. I would like to (be/do)his (friends/friend).
5. This skateboard is yellow. It's (their/theirs).
有关建设工程项目管理叙述正确的是()。
A.项目管理的目的是实现费用.进度和质量等目标
B.施工方和设计方的项目管理是管理的核心
C.项目管理信息系统主要用于项目的组织控制
D.项目管理规划只涉及项目的决策和设计阶段