题干

已知a<b,则下列不等式中不正确的是(  )

A:a3<b3

B:﹣a+4>﹣b+4

C:﹣4a<﹣4b

D:a﹣4<b﹣4

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答案(点此获取答案解析)

C

同类题4

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    My wife Pat and I were having drinks outside our home, The weather was unusually1for March in Mississippi, There was barely any breeze, After we finished the second cup, flashes of2danced across the sky. When the first drops of rain drove us3 the phone rang.Pat's face4on that gray and hot day. It was our son, David, a helicopter pilot who5in the US Air Force in South Korea. David intended to sound6but we recognized the sign of homesickness from his voice7the power of conversation made us feel8until a crash shook the windows.

    David wondered what it was,“Just thunder,”Pat said.

    There were several seconds of silence,“David”,I asked, “are yo9there?”

    “Yes…apart from the two of you, do you know what else I10most? Thunder, We have rain, wind, and11here, but it never thunders, Remember? Dad, when I was a kid, you laughed me out of fear of thunder? I wish I were there to12with you now.”

    “Yes…”I said, trying to13my tears, On hanging up the phone, I told Pat,“I'm going to record our son some 14”“Bob, the neighbors will think you're crazy.”

    “David won't,” I said and went outside with a recorder, Later I15the tape to David with a single line:A16gift.

    David called again, “Dad,”he said,“you won't believe that some friends and I had a thunder party where we realized we were listening to the sounds of 17 Thanks, Dad! It was really a special present,” While David was in Korea, we found ourselves 18thunderstorms.19feeling blue, we regarded the thunder as special which let us know that wherever we might be, we were 20together as a family.

同类题5

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    Anorexia nervosa (神经性厌食症) is an eating disorder that I struggled with for most of my middle school years and a part of my high school years.

    At Riverview,1was usually a nightmare for me. As I 2 the dining hall, all the eyes would be fixed upon my bony figure. I would take my place at a table full of friends and 3 to enjoy a "normal" lunch. The 4 was that I would not always eat lunch, and that greatly 5 my friends. They would watch to make sure that I was eating properly, almost 6 food into my mouth.

    And then, I transferred to Madison High School. I decided not to tell anyone at that school about my eating disorder since I had almost 7 by that time. Strangely, I stopped fearing lunch when I started at Madison. No one knew that I had an eating disorder,8 they did not care what I ate. This 9 a huge amount of stress from my life. It was still hard for me to eat in front of others, which is 10for an anorexic, but I was able to put some of my 11 aside.

    I was thankful for the students at Riverview, but they knew me only as an anorexic. My friends cared about my health, but they 12 to care about me as a person. Truthfully, all I wanted was for them to 13 me and not to fix on my eating disorder.

    The students at Madison took the time to know who I 14 was. They had no idea that I had been an anorexic, so that a particular label did not 15 their opinions of me. I was finally 16 for my talents and achievements, not my failures. I was honored as a good student. I was no longer afraid to show my true 17.

    My days as an anorexic taught me many lessons that I would never 18. They taught me about life and how to be a better friend. I learned about the joy of 19 tasks such as eating lunch. I appreciated the people who helped me to see that there is more 20 life than having an eating disorder.