已知函数f(x)=alnx-x2,x=1是f(x)的一个极值点.(1)求a的值;

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问题:

已知函数f(x)=alnx-x2,x=1是f(x)的一个极值点.
(1)求a的值;
(2)若方程f(x)+m=0在[
1
e
,e]内有两个不等实根,求m的取值范围(其中e为自然对数的底数);
(3)令g(x)=f(x)+3x,若g(x)的图象与x轴交于A(x1,0),B(x2,0)(其中x1<x2),求证:
5
2
<x2-x1
7
2
.(参考数据:ln2≈0.7 e≈2.7)
考点:函数的极值与导数的关系
题型:解答题

下面各数一个零都不读的有______,只读一个零的有______

A.80080000000 B.80008000000 C.80800000000.

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第二节信息匹配(共5小题;每小题2分, 满分10分)

首先请阅读下列人物的基本信息:

56. Carol Morgan likes many kinds of music, but her  favo

urite is jazz. The only music she really doesn’t like is piano music, even if it’s jazz.

57. Mark Moloney doesn’t care very much about music, but he does like to have soft, gentle music playing in his flat sometimes. He isn’t keen on classical or jazz music, but he likes piano playing.

58. Andrea Bolton likes all kinds of music, but her favourite instrument is electric guitar – she’s a big fan of Eric Clapton, for example. She also quite likes jazz and folk music.

59. Dave Stone only likes instrumental music – he never buys anything vocal(嗓音). He likes rock and pop, but his preference is for classical music.

60. Sally prefers classical music to jazz and folk. As a teacher, she thinks choral art is the most operable art form for the education of emotion and beauty appreciation. So she likes to enjoy songs performed by a chorus.

下面是一些CD的简要内容。请把相关的内容与购买者匹配起来。

This week’s

NEW MUSIC RELEASES

A. The best of Keith Jarrett

The maestro of jazz piano continues to astound audiences around the world. This collection of his greatest work includes The Koln Concert, Part 1 and extracts from the Paris Concert as well. Excellent value and a must for all jazz lovers. ₤12.99 ♪ ♪ ♪

B. Richard Thompson 1980-2000

Thompson’s stunning electric guitar playing, and his folk-rock songs, are gathered together on a 2-CD collection that shows the best of his work over the last two decades.  ₤18.99 ♪♪

C. Richard Clayderman

French pianist known for his relaxing piano music, has this new collection out on CD. Ideal as a present for the person who likes relaxing background music.   ₤ 9.99 ♪

D. The Monteverdi Vespers of 1610

This new recording of Monteverdi’s great choral work is excellent with great singing from the Milton Keynes Chorus. Classical music lovers will want to add this one to their collections.

₤ 24.99 for the 2-CD set ♪♪♪

E. The Best of Paco Pena

The great classical guitarist shows all his brilliance in this new collection. Works by Vila-Lobos and Haydn, amongst others. Great value at only ₤ 9.99 ♪♪

F. Wynton Marsalis

The great jazz trumpeter(吹号手) has put together some of his best-known numbers and a few new pieces on this magical set. Perhaps not as classy as his last offering, but all jazz aficionados will want this one anyway.  ₤ 13.99♪

♪ fair    ♪ ♪ good     ♪ ♪ ♪ excellent

题型:解答题

单品管理是指企业根据企业自身的营销目标,对所销售的商品进行单品的()。

A.配送

B.储存

C.运输

D.配置

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下列中,()不是三态TTL门的状态。

A.高电平状态

B.低电平状态

C.高阻状态

D.不固定状态

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根据我国《宪法》及有关法律的规定,有权参与税收立法和政策制定的机关有( )。

A.财政部

B.国务院

C.国家税务总局

D.教育局

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