骨筋膜室综合征的临床表现和治疗原则有哪些?

下列各组物质中，前者是纯净物而后者是混合物的是（　　）

A．净化的空气、氮气

B．氮气、水

C．二氧化碳、食盐水

D．汞、红磷

本票的持票人未按照规定期限提示本票的，丧失对出票人的追索权。 ( )

下列稀溶液置于空气中，经一段时间后，pH变小的是（不考虑溶质的挥发）

①H₂SO₄                  ②Ca（OH）₂                     ③氯水   ④Na₂SO₃ ⑤H₂S

A．①②③④

B．①③④

C．①③⑤

D．②④⑤

阅读理解

     Not all memories are sweet. Some people spend all their lives trying to forget bad experiences.

Violence and traffic accidents can leave people with terrible physical and emotional scars(伤疤). Often

they relive(在想像中再体验)these experiences.

     Now American researchers think they are close to developing a pill, which help people forget bad

memories. The pill is designed to be taken immediately after a frightening experience. They hope it might

reduce, or possibly erase(抹去)the effect of painful memories.

     In November, experts tested a drug on people in the US and France. The drug stops the body

releasing(发放出)chemicals that fix memories in the brain. So far, the research has suggested that only the emotional effects of memories may be reduced, not that the memories are erased.

     The research has caused a great deal of argument. Some think it is a bad idea, while others support it. Supporters say it could lead to pills that prevent or treat soldiers' troubling memories after wars.

     They say that there are many people who suffer from terrible memories. "Some memories can ruin

people's lives. They come back to you when you don't want to have them in a daydream or nightmare.

They usually come with very painful emotions," said Roger Pitman, a professor of psychiatry(精神病学)at Harvard Medical School,"This could relieve(减轻)a lot of that suffering."

     But those who are against the research say that changing memories is very dangerous because

memories give us our identity. They also help us avoid the mistakes in the past. "All of us can think of bad

events in our lives that were horrible at the time but make us who we are. I am not sure whether we'd want to wipe those memories out." said Rebecca Dresser, a medical ethicist.

1. The underlined word "it" in Paragraph 4 refers to "_____".

A. the new drug

B. the research into the drug

C. the bad memory

D. the chemical in the drug

2.Which of the following is NOT the opinion of the opponents(反对者)?

A. Our memories give us our identity.

B. The memories help human avoid mistakes of the past.

C. The drug should be used in only very serious cases.

D. People may not be sure whether they want to wipe the memories out.

3. What's the main idea of this passage?

A. People often suffer from bad memories.

B. American researchers have developed a pill.

C. Forget bad memories, and be happy.

D. Developing pills for helping forget bad memories has caused a heated argument.

真理多元论的错误实质主要在于它（）。

A.曲解真理的具体性

B.忽视真理的相对性

C.否认真理的客观性

D.夸大真理的多样性