圬工水沟的验收标准是什么?
参考答案:
水沟断面、纵坡符合要求;沟底平顺、无积水;出水口、沉降缝、泄水孔位置适当;圬工质量符合要求。
Could you tell me _____ at the meeting? [ ]
A. what did he say
B. what does he say
C. what is he saying
D. what he said
不确定型决策中悲观法的缺点是()
A.风险性大
B.敏感度差
C.缺乏进取精神
D.百密一疏