问题 多项选择题

差示电位多层膜的膜片中离子选择性电极的组成包括()

A.离子选择敏感膜

B.支持层

C.银/氯化银层

D.吸水材料层

E.参比层

答案

参考答案:A, B, C, E

阅读理解

阅读理解

     Homebuyers nationwide are watching housing prices going up, up, and up. "How high can they go?"

Is the question on everyone's lips. "As long as interest rates stay around 5 percent, nothing might be able

to prevent housing prices going up," said one house seller in Santa Monica, California.

     "It's crazy," said Tim, who is looking for a house near the beach. "In 1993, I bought my first place,

a two-bedroom flat in Venice, for$70,000. My friends thought then that I was overpaying. Five years

later, I had to move. I sold it for $ 230,000, which was a nice profit. Last year, while visiting friends

here, I saw in the local paper that the exact same flat was for sale for $ 510,000!"

     It is a seller's market. Homebuyers feel like they have to offer at least 10 percent more than the

asking price. Donna, a new owner of a one-bedroom flat on Venice Beach, said, "That's what I did.

I told the owner that whatever anyone offers you, I'll give you $ 20,000 more under the table, so you

don't have to pay your house seller any of it. I was tired of negotiating with the house sellers."

     Tim says he hopes he doesn't get that desperate. "Whether you decide to buy or not, you still feel

like you made the wrong decision. If you buy, you feel like you overpaid. If you don't buy, you want to

kick yourself for passing up a great opportunity."

     Everyone says the bubble(气泡)has to burst sometime, but everyone hopes it will burst the day after

they sell their house. Even government officials have no idea what the future will bring. "All we can say is

that, clearly, these things go in regular cycles," said the state director of housing. "What goes up must

come down. But, as we all know, housing prices always stay up a little higher than they go down

(被接受). So you can't lose over the long run. Twenty years down the road, your house is always

worth more than you paid for it."

1. If Tim had sold his flat last year, he could have earned __________.

A. $ 510,000      

B. $ 440,000

C. $ 280,000  

D. $ 160,000

2. Donna paid another $ 20,000 to the owner secretly because __________.

A. she felt like offering 10% more

B. secret money made low price

C. the owner asked for the money

D. she was bored with bargaining

3. We can infer from Tim's words in Paragraph 4 that __________.

A. homebuyers feel hesitate facing rising house prices

B. buying a house is always a great opportunity

C. homebuyers never make the right decision

D. both sellers and buyers become desperate

4. Which of the following is TRUE about the housing bubble?

A. It is something everyone hates to see.

B. Only experts know when it will burst.

C. It is unavoidable in the regular circles.

D. It usually stays for about twenty years.

问答题 简答题