6. ________ people with mental－health problems want most of all is a more equal and open working culture.

A．That　　 B．What C．When　　　 D．All what

5. We agreed to accept 　　　　　they thought was the best professor in the college .

　　 A．Whatever 　　　　　　 B．whomever 　　　　 C．whichever 　　　　　 D．whoever

4. The traveler lost his way in the woods, and 　　　made things worse was that it was getting dark.

A．that　　 B．what　 C．which　　　 D．as

3. -Go and ask her 　　　　　come .

　　 -OK.　　　　　　　　　　　　　

　　 A．what time would she like to 　　　　　　　　　 B．at what time she’d like to

　　 C．when would she like to 　　　　　　　　　　　　 D．when she likes to

2. -I rang you at about nine, but there was no reply.

　　　 -Oh, that was probably 　　　I was seeing the doctor.

　　 A．why　　　　　　　　　　 B．when　　　　　　　　　 C．what　　　　　　　　　 D．that

1. She looks sad. Could you please tell me ____ that prevents her from being as happy as before?

A. what it is　　 B. it is what　　　 C. how it is　　　　 D. it is how

2.设函数的图象如图所示，且与在原点相切，若函数的极小值为，(1)求的值；(2)求函数的递减区间．

1.设f(x)=x³+,求函数f(x)的单调区间及其极值.

4. 若函数y=x³+ax²+bx+27在x=－1时有极大值，在x=3时有极小值，则a=___________,b=___________.

归纳反思：

课后探究：

3.函数y=－x³+48x－3的极大值为___________；极小值为_________