施工和竣工验收阶段造价管理的重要环节是()。
A.工程价款决算
B.工程价款结算
C.工程价款变更确认
D.工程价款清算
参考答案:B
命题“存在实数x,使x>1”的否定是( )
A.对任意实数x,都有x>1
B.不存在实数x,使x≤1
C.对任意实数x,都有x≤1
D.存在实数x,使x≤1
— Excuse me, but do you mind if I use your cellphone?
— ______. It's on the table over there. [ ]
A. With pleasure
B. Help yourself
C. You got it
D. Have a good time