A0987的个人空间

A0987： 三角化简

cos10度cos50度cos70度

2010-05-29 11:18 来自版块 - 

A0987： 最值

a>b>0,ab=1则(a-b)/(a2+b2)最大值

2010-03-14 08:59 来自版块 - 

A0987： 数列

Sn是等差数列An的前n项和。S1=1,点（n,Sn）在抛物线C上，C和直线X-Y+1=0交于A，B两点，AB=根号6，求An通项公式

2010-03-14 08:57 来自版块 - 

A0987： 区别

care about, care for

2010-02-16 17:41 来自版块 - 

A0987： 从句

Can you help me chose some books____children? A are adapted to B adapted to C that adapted to D which adapted to

2010-02-15 18:18 来自版块 - 

A0987： 情景

----Dad! Tom's broken a glass!----____.Accident will happen.A No way B Doesn't matter C Ｎｏ trouble D Don't mention

2010-02-12 18:06 来自版块 - 

A0987： 区分

allow permit admit

2010-02-12 17:43 来自版块 - 

A0987： 独立主格

Five people won the award,a title___to ordinary people their conthributions to environmental protection. A being given B is given C give... 全文

2010-02-12 17:41 来自版块 - 

A0987： 连词

He is very selfish ,___,of course,made the others unhappy.A who B which C this Dwhat

2010-02-12 17:35 来自版块 - 

A0987： 主语从句

——has recently been done to provide more buses for the people,a shortage of public vehicles renains a serious problem.A That B What C In s... 全文

2010-02-12 17:29 来自版块 - 

A0987： 序数词

—— I saw him,I koow he is my former friend,henry.A A second B The second C For the second D In a second

2010-02-12 17:18 来自版块 - 

A0987： 请教

This X-ray machine needs --------为什么填repairing 而不用被动

2010-02-12 17:06 来自版块 - 

A0987： 区别

connounce declare claim

2010-02-12 16:53 来自版块 -