5.-----When __________ and visit our factory next month?
-----When __________ , I’ll let you know.
A.will he come; he will come B.will he come; he comes
C.does he come; he will come D.does he come; he comes
4.Don’t get off until the bus __________.
A.stopped B.will stop
C.will have stopped D.stops
3.-----What did the teacher say just now?
-----Sorry.I didn’t catch it.I ___________ something else.
A.think about B.will think about
C.was thinking about D.thought about
2.The young lady rushed into the room _______ she heard the noise.
A.the moment B.the moment when
C.immediately when D.at the moment
1.It took us quite a long time to get there.It was _________ journey.
A.three-hour B.a three hour
C.a three-hour D.three hours
19.(10分)已知函数,且
(1)(2分)求的值;
(2)(3分)判断函数的奇偶性;
(3)(5分)判断在上的单调性并加以证明
18.(10分)二次函数满足且.
(1)(5分)求的解析式;
(2)(5分)求在区间上的最大值与最小值。
17.(8分)设全集U={1,2,3,4,5},集合A=B=,,A∩B={2},求、、的值
16.(10分)求函数的定义域,并用区间表示。
15.(10分)若集合 和
(1)(3分)当时,求集合
(2)(7分)当时,求实数取值范围