问题 选择题

下列各物质(或其主要成分)的名称或俗称与其后的化学式不一致的是

A.金刚石石墨 C

B.冰干冰 H2O

C.氧气液氧 O2

D.石灰石大理石 CaCO3

答案

答案:B

题目分析:A、一致,金刚石、石墨都是碳元素组成的单质,故化学式用C表示;B、不一致,冰的化学式为H2O,干冰指固态二氧化碳,化学式为CO2;C、一致,液氧就是处于液态的氧气,化学式都为O2;D、一致,石灰石,大理石主要成分都是CaCO3

阅读理解

阅读理解。

     A passenger was looking everywhere for his ticket because the conductor was coming up to punch tickets. He searched the pockets of his trousers, his coat and his wallet. To the other passengers' surprise, they saw

that he had the ticket in his mouth. The conductor quickly pulled the ticked out of his mouth, punched it, and

gave it back to him. When the conductor moved on, the passenger's friend said, "I'm sure you felt foolish just

now, sitting there looking everywhere for your tickets when it was right in your mouth all the time."

    "Foolish?" answered the passenger. "I was chewing the date off."

    When his friend heard this, he criticized him and asked him to buy a ticket.

1. The passenger ________.

A. lost his tickets

B. didn't buy a ticket for the trip

C. was looking for a lost ticked

D. forgot when he had put his ticket

2. The other passengers wanted to laugh because ________.

A. the passenger lost his ticket

B. the passenger was chewing his ticket

C. the passenger had no ticket

D. they saw that the passenger had the ticket in his mouth

3. His friend ________.

A. knew why he was looking for the ticket

B. didn't know why he was looking for his ticket

C. didn't know he had lost his ticket

D. didn't know that he didn't have the money for a ticket

4. The conductor ________.

A. thought the man was not honest

B. knew why the man was chewing the ticket

C. thought the man had forgotten that the ticket was in his mouth

D. knew why the man had put the ticket into his mouth

5. The ticket in his mouth ________.

A. was someone else's

B. was the right one for the trip

C. was an old ticket that shouldn't be used again

D. was the one he bought on the train

阅读理解

Research has shown that music has an important effect on one’s body and psyche (心灵). In fact, there is a growing field of health care known as music therapy(治疗), which uses music to treat diseases. Even hospitals are beginning to use music therapy. This is not surprising, as music affects the body and mind in many powerful ways.

Research has shown that quick music can make a person feel more alert(警觉戒备), while slow music can produce a calm, deep thinking state. Also, research has found that music can change brainwave activity levels. This can help the brain to change speeds more easily on its own as needed, which means that music can bring lasting benefits to your state of mind, even after you’ve stopped listening.

Breathing and heart rates can also be influenced by music. This can mean slower breathing, slower heart rate. This is why music and music therapy can help reduce the damaging effects of long-term stress, greatly promoting (促进) not only relaxation, but health.

Music can also be used to bring about a more positive state of mind by helping to keep worries away. Music has also been found to bring many other benefits, such as lowering blood pressure and reducing the risk of strokes(中风). It is no surprise that so many people are considering music as an important tool to help the body become or stay healthy.

小题1:What can we infer about music therapy(治疗)?

A.It is a type of music.

B.It is a research about music.

C.It is a kind of musical effect on diseases.

D.It is the use of music method to help treat diseases.小题2:According to the second paragraph, we can know that ________.

A.music with different speeds has different effects

B.quick music is not good for one’s health

C.slow music can help one to think more calmly and slowly

D.music will have less benefit after one stops listening小题3:The reason why music can help deal with stress is that ________.

A.it is used by many hospitals

B.it can help change brainwaves

C.it does good to breathing and heart rates

D.it can bring a more positive state of mind小题4:According to the passage, music can help deal with all the following EXCEPT ______.

A.nervousness

B.mind illnesses

C.strokes

D.high blood pressure