问题 选择题

下列离子方程式的书写中正确的是

A.碳酸氢钙溶液中加入足量烧碱溶液:===

B.向溴水中通入:===

C.向氨水中通过量:===

D.向次氯酸钙溶液中通入少量的:===

答案

答案:B

A不正确,碳酸氢钙是强电解质,用离子表示;C不正确,CO2过量,生成物是碳酸氢铵;D不正确,次氯酸钙具有氧化性,能氧化SO2,生成硫酸,因此正确的答案选B。

阅读理解

In a generous display of maturity and sympathy, one Jewish boy made his first deed as a man in his faith a great act of charity.

Joshua Neidorf, a 13-year-old boy from Los Angeles, donated most of his birthday money to Operation Mend, a program that reconstructs the faces of severely burned U. S. veterans(退伍老兵).

The young man decided to donate his money after getting to know Army Sgt. Louis Dahlman, who was undergoing a series of reconstruction surgeries(手术)at UCLA (University of California at Los Angeles) thanks to Operation Mend. The Neidorfs had signed up to be Dahlman’s “buddy family”, spending time with him whenever he visited Los Angeles for a surgery.

“I just love knowing that it’s going somewhere...to help the people who save our lives and keep us safe every day,” said Neidorf. His mother added, “It makes me feel like our world is going in a good direction with this next generation.”

In all, Neidorf gave $13,000 to Operation Mend. He also encouraged his friends to donate to the cause. He is the organization’s youngest donor so far.

Operation Mend is a privately funded program that works in partnership with the UCLA Medical Center. Ron Katz, a board member at the hospital, started the program in 2006 after seeing a TV programme about Aaron Mankin, a veteran who had gone through dozens of surgeries after a fight in Iraq which completely burned off his face.

Mankin ended up being Operation Mend’s first patient, starting the first of 20 reconstructive facial surgeries at UCLA in Sept. 2007. In a 2011 interview, Katz shared how his experience of helping Mankin made him realize the need to establish a more permanent program.

“My wife and I soon realized that there were dozens of Aarons out there,” Katz said. “They deserve the best that we offer them.”

小题1:Neidorf decided to help veterans because ________.

A.he benefited from Operation Mend

B.he was afraid of burned faces

C.he thought they deserved help

D.he didn’t know how to spend money小题2:Operation Mend was founded after ________.

A.Neidorf donated part of his birthday money

B.the Neidorfs signed up to be Dahlman’s “buddy family”

C.Ron Katz saw a TV programme about a veteran

D.Mankin was successfully operated on at UCLA小题3:What can we learn from the passage?

A. Neidorf’s mother was opposed to his decision to donate money.

B. Mankin’s face was burned in a fire in America.

C. Mankin went through more than 30 facial surgeries at UCLA.

D. Many facial surgeries are needed to reconstruct a seriously burned face.

小题4:The last two paragraphs mainly tell us ________.

A.the process of Mankin’s surgery

B.how Operation Mend was set up

C.how Katz became famous

D.veterans are respected by people

单项选择题