问题 填空题

胃酸过多是常见的胃病。下面是甲、乙两种常见胃药的说明摘要。

甲:

(1)白色结晶状粉末,可缓缓分解;

(2)能溶于水,水溶液呈弱碱性;

(3)遇酸及酸性药物则产生二氧化碳;

(4)胃酸过多患者服用多见胃胀气,甚至有引起胃溃疡穿孔的危险 。

乙:

(1)与胃酸作用是中和反应,作用缓慢而持久,可维持3~4小时。

(2)凝胶本身覆盖于溃疡面上,具有保护作用。

(3)可溶于稀酸或氢氧化钠溶液中。

(1)请你推测,甲中含有的主要化学成分是________(填化学式);乙中含有的主要化学成分是________(填化学式)。

(2)试写出甲中含有的主要化学成分引起胃胀气反应的离子方程式:__________________________。

(3)试写出乙中含有的主要化学成分溶于NaOH溶液的离子方程式:____________________________。

答案

(1)NaHCO3;Al(OH)3

(2)HCO3-+H===H2O+CO2

(3)Al(OH)3+OH===AlO2-+2H2O

单项选择题 A1/A2型题
阅读理解

For Lee Ann Laraway, polio(脑灰质炎) has made almost everything in life just out of reach. But what her hands can't retrieve, her assistant can. Meet Jeannie, a three-year-old help, has become Lee Ann's arms and legs.

Jeannie understands no fewer than 72 commands. To get a feel for what that means, Lee Ann takes us on a shopping trip in San Jose. First stop: The bank, where she got cash from the teller. From the bank, it's on to the drug store, where Jeannie got a candy bar for Lee Ann. Then Jeannie helped pay the cashier, and got change hack.

"When you have a really good working animal, they come and interact with you all the time," Lee Ann said. While there's no argument that Jeannie is an ordinary animal, she wasn't born that way. She was tutored and trained here at a facility that has become the final legacy of one of the Bay Area's most beloved figures.

Canine Companions for Independence sits on twelve acres of land in Santa Rosa donated by late Peanuts cartoonist Charles Shultz, Here, handlers work with specially selected labs for hours a day— but not every dog will make the cut.

The work is serious Business. In the case of hearing dogs, the animals alert their disabled owners to everything from ringing telephones to doorbells.

Other dogs will work with severely disabled patients like eight-year-old Noah Habib of Mountain View who communicates with a special computer. "I like it when new people come up to ask me about my dog," he says. "People are really interested in the dog and will come over and ask to pet her and ask to play with her, and ask about what she does, and these are people that normally might not approach us and want to talk to Noah," says his Dad.

And back in San Jose Lee Ann is arriving home with Jeannie and her groceries. With just one chore left—opening her own door. "You can train a dog to do a lot of things," said Lee Ann. "You cannot give them the heart to do the job, and that is what a good working dog has."

小题1:Lee Ann's dog Jeannie cannot ______.

A.get cash at the bank

B.pay a cashier for her

C.take on a telephone for her

D.open the door小题2:Canine Companions for Independence is a place for ______.

A.severely disabled children to have practice

B.people to donate money or legacy

C.ordinary dogs to be coached

D.people to learn business小题3:Which of the following can replace the phrase "make the cut" (Line 3, Para 4)?

A.become a good working dog

B.hurt the coach

C.become a helpful star

D.hurt itself小题4:According to Lee Ann, you cannot train an ordinary dog ______.

A.to put things on people's laps

B.to always interact with its owner

C.to alert deaf people

D.to love working