如果x＝－1時，那么－x2－(2x2－5x2)的值是

[　　]

A．

4

B．

－4

C．

－2

D．

2

練習(xí)冊系列答案
相關(guān)習(xí)題

科目：高中英語 來源：2014年外研版高中英語選修八模塊7練習(xí)卷（解析版） 題型：單項填空

---- Thanks a lot for your book. I found it very interesting.

---- _______. I’m glad you enjoyed it.

A. All the best B. It is nothing C. No thanks D. Very well.

 

查看答案和解析>>

科目：高中英語 來源：2015屆湖南瀏陽、醴陵、攸縣三校高三聯(lián)考英語試卷（解析版） 題型：閱讀理解

With all the wars, fighting and sadness in the world today, it's not only necessary, but also essential to have a good sense of humor just to help us get through each and every day of our lives. Putting a smile on someone's face when you know they are feeling down in the dump, makes me feel good and warms my heart.

How would you feel if you could not joke around with your wife, husband, child, co-worker, neighbor, close friends, or even just someone that you are standing in line with at your corner store? I am always saying things that make others smile or laugh, even if I don't know the person I'm joking around with. My Grandma always found humor in everything she did, even if it was the hardest job anyone could imagine. This not only relieves stress in any situation, but also is common courtesy(禮貌)to speak to others that are around you.

I know of a few people that don’t have a funny bone in their bodies, as they say. Everyone around them could be rolling on the floor after hearing a great joke and they would sit there without the slightest smile on their face. They don't get the joke that makes others laugh. I am busting a gut while they just sit there, looking at me as if I were from outer space. How can people not get a really funny joke?

Laughing is essential to keep your stress levels under control. Without humor we would find ourselves with a lot of psychological problems, or on a lot of medications to keep us from going crazy. There is too much sadness in this present world. It drives people crazy. We all need to find a way to ignore the sadness and bring a little light into our lives. So, I believe our best medicine is to get together and tell some jokes and have some fun laughing together.

1. According to the author, humor is useful in the aspect that _________.

A. it makes people more confident

B. it can pick up people’s spirits

C. it can help get rid of the cruelty in the world

D. it can help people get on well with others

2. From the second paragraph, we can know that __________.

A. the writer is funny and polite

B. family members should play tricks on each other

C. the writer’s grandma is humorous

D. we should relieve stress in any situation

3.The phrase “busting a gut" in the third paragraph can be replaced by _______.

A. explaining carefully

B. speaking loud

C. keeping silent

D. laughing hard

4.In writing the passage, the author mainly intends to _______.

A. encourage people to be humorous in daily life

B. talk about his own understanding of humor

C. introduce a practical way to get through daily life

D. convince people of the power of being optimistic about life

5.What is the author’s attitude towards the present world?

A. Critical B. Positive

C. Satisfied D. Indifferent

 

查看答案和解析>>

科目：高中英語 來源：2015屆湖南瀏陽、醴陵、攸縣三校高三聯(lián)考英語試卷（解析版） 題型：單項填空

The fans _____the names of the band members when they appeared at the airport.

A. had screamed out B. were screaming out

C. would scream out D. have screamed out

 

查看答案和解析>>

科目：高中英語 來源：2015屆湖南婁底高中名校高三9月聯(lián)考英語試卷（解析版） 題型：閱讀理解

For centuries, the body’s blood has been linked closely with the emotions. People who show no human emotions or feelings, are said to be cold-blooded killer. For example, the police are searching for a cold-blooded killer. He seems to kill for no reason, and no emotion, as if taking someone’s life as nothing.

Cold can affect other parts of the body. The expression “get cold feet” has nothing to do with cold or your feet. The expression means being afraid to do something you have decided to do. For example, you agree to be president of an organization. But then you learn that all the other officers have resigned, and all the work of the organizations will be your responsibility. You are likely to get cold feet about being president when you understand the situation.

The expression“give someone the cold shoulder”probably comes from the physical act of turning your back toward someone instead of speaking to him face to face. You may give a cold shoulder to a friend who has not kept a promise he made to you. Or, to someone who has lied about you to others.

A cold fish is not a fish. It is a person. But it is a person who is unfriendly, unemotional and shows no love or warmth. A cold fish does not offer much of himself to anyone. Someone who is a cold fish could be cold-hearted. Now a cold-hearted person is someone who has no sympathy. Several popular songs in recent years were about cold-hearted men or cold-hearted women who, without feelings, broke the hearts of their lovers.

“Out in the cold”means not getting something that everybody else got. A person might say that everybody but him got a pay raise —— he was left out in the cold. And it is not a pleasant place to be.

1.There are expressions related to cold that are mentioned in the passage.

A. 3 B. 4 C. 6 D. 7

2.When you refuse to speak to a man and treat him in a distant way, you may express by “ ”.

A. I give him the cold shoulder

B. I think he is a cold-blooded man

C. I think he is a cold fish

D. I’m likely to get cold feet

3.If Sue shows absolutely no reaction to those awful pictures of starving children in Africa, you will say .

A. she is a cold-blooded killer

B. she gets cold feet

C. she is a cold fish

D. she is out in the cold

4.We can use the expression “ ” to describe a man who abandons or hurts his lover without mercy.

A. cold-blooded B. cold shoulder

C. cold feet D. cold-hearted

5.The topic of this passage is about .

A. the relationship between cold and our body

B. some expressions about friendship

C. some expressions connected with cold

D. how cold weather comes into being

 

查看答案和解析>>

科目：高中英語 來源：2015屆湖北黃岡蘄春第一高級中學(xué)高二下期中英語試卷（解析版） 題型：閱讀理解

By the time I reached junior high，I was sure I wanted to be a nurse. If you didn’t study Latin，you couldn’t be a nurse，so I enrolled. Many Latin words were familiar to me. The hard part turned out to be the usage and creating sentences with the words that seemed so easy to pronounce. Several weeks into the course my teacher came to me，saying，“I think you should withdraw from this course. It seems to be too hard for you. ”

That was the day I learned I wasn’t smart enough to become a nurse. With shame. I handed in my Latin textbook.

After high school，the years raced by. I married and had children. Then one day my husband John came home. “Carol. Max died this afternoon. ”I looked at my husband with disbelief.

John was touched by this tragedy. Finally one evening he said，“Carol，Jackie has never worked and now she’s alone with four children. I've been thinking — if anything happens to me. I want you to be able to take care of yourself and the children. Why don’t you think about what you’d like to do and get the training you’ll need to do it?”

I signed up for the entrance exam for nursing programs. One day I received a letter from the schoo1. I wanted so badly to open it，but with my lack of confidence，I laid it on the kitchen counter saying，” I'm not in the mood for a rejection letter today. ”

Finally I forced myself to open it. “Dear Carol，”I read. ”We are pleased to inform you that you successfully passed the entrance exam.”

An insensitive teacher once stole my dream. If you have a dream, exhaust every effort to reach it. I’ve worked thirty years now as a nurse and I’ve never been more certain that this is what I was meant to be.

1.Why did John advise Carol to find a job?

A. To support the family

B. To be able to live independently

C. To live a more colorful life

D. To provide more money for her kids

2.From the text, we know what the teacher said____________.

A. saved Carol from wasting her time

B. helped Carol find her true interest

C. destroyed Carol’s dream to be a nurse

D. encouraged Carol to be careful in learning

3.After receiving the letter from the schoo1, Caro1____________.

A. couldn’t wait to open it

B. had no mood to read it then

C. didn’t take it seriously at all

D. was uncertain about the result

4.What may be the best title for the text？

A. Too stupid to be a nurse

B. A dream too high to achieve

C. Never too late to 1earn

D. A chance too important to miss

 

查看答案和解析>>

科目：高中英語 來源：2014年外研版高中英語選修十模塊2練習(xí)卷（解析版） 題型：單項填空

Don’t trouble to see me ______ the door I know my way out.

A. to B. in C. off D. outside

 

查看答案和解析>>

科目：高中英語 來源：2014年外研版高中英語選修十一模塊7練習(xí)卷（解析版） 題型：單項填空

—Tom went to Beijing for a holiday yesterday.

—________.We played football together this morning.

A．That’s a good idea B．I couldn’t agree more

C．You can’t be serious D．I’m not sure about it

 

查看答案和解析>>

科目：高中英語 來源：冀教版（新課標(biāo)） 選修10 題型：

(1)在知識競賽中，如果＋10表示加10，那么扣20分怎樣表示？

(2)某人轉(zhuǎn)動轉(zhuǎn)盤，如果用＋5表示沿用逆時針方向轉(zhuǎn)了5圈，那么沿順時針方向轉(zhuǎn)了12圈怎樣表示？

(3)在某次乒乓球質(zhì)量檢測中，一只乒乓球超出標(biāo)準(zhǔn)質(zhì)量0.02克記作＋0.02，那么－0.03克表示什么？

查看答案和解析>>

同步練習(xí)冊答案