题干

x1,x2是一元二次方程 x2+10x+16=0 的两个根,则x1+x2值是:(   )

A:-10

B:10

C:-16

D:16

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答案(点此获取答案解析)

A

同类题1

根据短文内容和首字母提示,在下文空格处填入适当的词使短文完整。在标有题号的横线上,完整写出空缺处所填单词的正确形式。(每空一词)

    He met her at a party. She was excellent. After the party, he invited her for coffee. She was surprised. So as not to appear rude, she went along.

    As they sat in a nice coffee shop, he was t____ nervous to say anything and she felt uncomfortable. Suddenly, he asked the waiter, "Could you please give me some salt? I'd like to put it in my coffee."

    They looked at him for a long time. He turned red, but when the salt came, he put it in his coffee and drank. Curious, she asked, "Why puts____ in the coffee?" He explained, "When I was a little boy, I lived near the sea. I liked playing on the seaside. I could feel its taste salty, like salty coffee. Now every time I drink it, I think of my childhood and my hometown. I miss it and my parents." She was d____ touched. A man who can admit(承认) that he's homesick must love his home and care about his family. He must be responsible. That was the start of their l____ story. They chose to date(约会). She found that he met all her requirements(要求). So they married and lived h____ together. And every time she made coffee for him, she put in some salt, the w____ he liked it.

    After 40 years, he d ____and left her a letter which said: “My dearest, please forgive(原谅)my life-long lie. Remember the first time we dated? I was so nervous I asked for salt instead of sugar. It was hard for me to ask for a change, so I just went ahead. Many times, I tried to tell you the t____, but I was afraid that it would ruin(毁灭) everything. Sweetheart, I don't exactly like salty coffee. But as it mattered so much to you, I've learnt to enjoy it. Having you with me was my greatest happiness. If I could live a s____ time, I hope we can be together again, even if it means that I have to drink salty coffee for the r____ of my life.

同类题3

完形填空

    I do not know why I came to the decision to become a loser, but I know I made the choice at a young age. Sometime in the middle of fourth grade, I stopped 1. By the time I was in seventh grade, I was your2degenerate (颓废): lazy, rebellious, and disrespectful. I had lost all social 3 I terminally (不可救药的) followed, what was fashionable.

    Not long after that, I dropped out of school and 4 my downward spiral. Hard physical labor was the5for the choices I made as an adolescent. At the age of twenty-one, I was6 lost and using drugs as a way to deal with the fact that I was uneducated and7 in a dead-end job carrying roof materials up a ladder all day.

    But now I believe in do-overs, in the8 to do it all again. And I believe that do-overs can be made at any point in your life, if you have the right 9 Mine came from a10source.

    It was September 21, 2002, when my son Blake was born. It's funny that after a life of 11responsibility, now I was in charge of something so 12Over the years, as I grew into the title of Dad, I began to learn something about myself13 Blake and I were both learning to walk, talk, work, and play for the first time. I began my do-over.

    It took me almost three years to learn 14to read. I started with my son's books. Over and over, I practiced reading books to him15 I remembered all the words in every one of them. I began to wonder if it was possible for me to go back to school. I knew I wanted to be a good role model,16 after a year-and-a-half and a lot of hard work, I passed my GED test on my son's fourth birthday. This may not sound like 17and I am not trying to get praise for doing something that should have been done in the first place, but all things considered it was one of the18days in my life. Today, I am a full-time college student, studying to become a sociologist.

    Growing up, I19 heard these great turn-around stories of triumph over shortcomings. But I never thought they applied to me. Now I believe it is a (an)20anyone can make: To do it all over again.