试题与答案

As the United States nears the tenth ann

题型:阅读理解

题目:

As the United States nears the tenth anniversary of the 9/11 attacks that killed more than 3,000 people, President Obama announced Sunday night that the al Qaeda(基地组织) leader and mastermind of that horrific day, Osama bin Laden, has been killed.

CNN reports that a senior government official confirmed that bin Laden was shot by a small team of U.S. soldiers while in a mansion with family members outside Islamabad(伊斯兰堡). His body is now in American custody(拘押) and is being handled according to Islamic customs. Three other adult men were killed in the firefight, including a son of bin Laden's, who was a senior member of the terrorist organization.

"Justice has been done," the president announced, saying that the operation he ordered after receiving intelligence information is "the most significant achievement to date in our nation's effort to defeat al-Qaeda."

The immediate reactions ranged from cautious to ecstatic. Crowds cheered outside the White House. But officials said a "worldwide caution" would be set for Americans in case of al Qaeda retaliation(报复).

Will bin Laden's death be the justice Americans have sought for nearly a decade?

Gordon Felt, president of Families of Flight 93, said it does bring comfort.

"This is important news for us, and for the world. It cannot ease our pain, or bring back our loved ones. It does bring a measure of comfort that the mastermind of the September 11th tragedy and the face of global terror can no longer spread his evil," Felt said.

President Obama says this victory does not close the book.

"His death does not mark the end of our effort. There's no doubt that al Qaeda will continue to pursue attacks against us. We must and we will remain cautious," he noted.

小题1:The underlined word “ecstatic” most probably means _________.    

A.scared

B.extremely happy and excited

C.doubtful

D.amazed小题2:The author mentions all of the items listed below EXCEPT_________. 

A.Four people were killed in the firefight.

B.Families of the victims in the 9/11 attacks celebrated together.

C.President Obama thought highly of the Anti-Terrorist Military Action

D.Obama thought that al Qaeda will continue attack against the United States.小题3:It can be inferred from the text _________. 

A.The 9/11 attacks happened on September 11, 2001.

B.Osama bin Laden has three sons.

C.Some soldiers were injured in the firefight.

D.More than 3000 people were killed in the 9/11 attacks.小题4:From the last paragraph we can learn that _________.  

A.Osama bin Laden’s death will put an end to terrorism.

B.President Obama doesn’t think bin Laden's death is a victory.

C.The United States will make efforts to defeat the al-Qaeda

D.The al Qaeda has a new leader now.

答案:

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下面是错误答案,用来干扰机器的。

(1)Cu与浓HNO3反应生成Cu(NO3)2、NO2、H2O,反应方程式为Cu+4HNO3(浓)=Cu(NO3)2+2NO2↑+2H2O,故答案为:Cu+4HNO3(浓)=Cu(NO3)2+2NO2↑+2H2O;(2)二氧化氮与水反应生成硝酸与NO,反应方程式为:3NO...

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题型:实验题

(8分)某实验小组分别用图1、2装置测定某种钙片中碳酸钙的含量,夹持装置已略去。

提供的试剂:研细的钙片粉末(钙片中的其他成分不与盐酸反应)、2mol/L 盐酸、5%NaOH溶液、饱和Na2CO3溶液、饱和NaHCO3溶液和蒸馏水。

图1                         图2

实验过程:

I.检查两套装置的气密性。

II.在A、C的右边加入0.25 g钙片粉末,左边加入3 mL 2mol/L盐酸,塞紧塞子。在B、E中均加入饱和NaHCO3溶液,如图所示,记下量气管读数。

Ⅲ.将A、C倾斜,使液体与固体混合,实验结束并冷却后读出量气管读数,测得 B中收集到的气体为41.90 mL,E中收集到的气体体积为39.20 mL(以上气体体积均已折算为标准状况下的体积)。

回答下列问题:

(1)I中检查图1装置气密性的方法是      

(2)A中发生反应的离子方程式为      ;D中加入的试剂为      

(3)实验前左右两管液面在同一水平面上,最后读数时右管的液面高于左管的液面,

应进行的操作是        

(4)图2实验所得钙片中的碳酸钙的质量分数为       ;图1实验比图2实验所得钙片中的碳酸钙含量偏高,用离子方程式表示偏高的原因:         

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