以相似项目作参考是组织规划的( )。
A．原则
B．目标
C．内容
D．方法
参考答案：D
— We have two seats free here. Which one would you like?
— ____! My mother is coming to see the film with me.[ ]
A. None
B. Neither
C. All
D. Both
合格品混凝土路缘石吸水率不大于（）%.
A.6
B.7
C.8
D.9
