如圖，在△ABC中，AB＝5，BC＝3，AC＝4，動(dòng)點(diǎn)E（與點(diǎn)A、C不重合）在AC邊上，EF∥AB交BC于點(diǎn)F．

【小題1】當(dāng)△ECF的面積與四邊形EABF的面積相等時(shí)，求CE的長
【小題2】當(dāng)△ECF的周長與四邊形EABF的周長相等時(shí)，求CE的長
【小題3】試問在AB上是否存在點(diǎn)P，使得△EFP為等腰直角三角形？若不存在，請簡要說明理由；若存在，請求出EF的長．

計(jì)算的結(jié)果是（ ）

A．

B．

C．

D．

如果是二次根式，那么應(yīng)滿足的條件是（   ）

A．

B．

C．≥

D．≤

Once a man and his wife worked for a businessman．There was a big box in the businessman’s living room．The businessman pointed at the box and said，“There’s only one thing you  1   do．Don’t open the box．”After  2    this，he left the living room．
The woman said to her husband，“There must be  3   in the box．Let’s open it，shall we?” Her husband said ___4___ to her．
But the woman didn’t give up her idea．One day，she decided to ___5___ what was      __6   it．Her husband didn’t stop her this time．She opened the box and looked inside．She found nothing in the box and then tried hard to close it,    7   she failed．
That evening the businessman came home and found the box was   8  ．He was very __9___ and asked the woman and her husband to leave his home．
“But there is nothing in the box，”the woman said．“We   10    anything at all．”The businessman shouted at them，“The box is not important．I cannot believe you．That’s important!”
【小題1】A．needn’t     B．wouldn’t   C．mustn’t       D don’t have to
【小題2】A．saying     B．said        C．says         D to say
【小題3】A．expensive something
B．something expensive
C．nothing expensive
D expensive anything
【小題4】A．yes        B．nothing     C．no           D hello
【小題5】A．look for    B．clean up    C．find out     D get over
【小題6】A．near       B．under       C．in           D on
【小題7】A．though     B．or         C．unless       D but
【小題8】A．closed     B．empty       C．open         D full
【小題9】A．happy      B．a(chǎn)ngry       C．stressed out  D worried
【小題10】A．didn’t take  B．won’t take  C．haven’t taken  D aren’t taking

下列圖形中，既是軸對稱圖形，又是中心對稱圖形的是（ ）
A．等邊三角形            B．矩形
C．正五邊形              D．等腰梯形

在半徑為18的圓中，120°的圓心角所對的弧長是（   ）

A．12p

B．10p

C．6p

D．3p

一個(gè)口袋內(nèi)裝有大小和形狀相同的一個(gè)白球和兩個(gè)紅球，“從中任取一球，得到白球”這個(gè)事件是(    ) 

A．必然事件

B．隨機(jī)事件

C．不可能事件

D．不能確定

彩云中學(xué)九年級(jí)（一）班同學(xué)舉行“奧運(yùn)在我心中”演講比賽．第三小組的六名同學(xué)成績?nèi)缦拢▎挝唬悍郑��?nbsp; ，  ，    ，   ，    ，    ．
則這組數(shù)據(jù)的眾數(shù)是（   ）

A．

B．

C．

D．

已知⊙O的半徑為8, 圓心O到直線l的距離是6, 則直線l與⊙O的位置關(guān)系是 　  

方程的解是 　　 ．