问题
填空题
若是x2+4y2+mxy一个完全平方式，则m=﹙ ﹚．
答案
±4
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若是x2+4y2+mxy一个完全平方式，则m=﹙ ﹚．
±4
| 用方框中所给单词的适当形式填空，使短文正确，通顺。每词限用一次。 | |
Some people like reading newspapers and 1______ enjoy novels or comic (喜剧的) books. My 2______ books are those about the lives of great people. Reading them always gives me a lot of 3______ on how to make my own life better. Great people are remembered not because they were handsome or beautiful, but because they did not give up 4______ their lives were difficult. They tried to use 5______ chance to change their lives and make the world 6______. One good example is Orville and Wilbur Wright, the two brothers who 7______ the airplane. The plane has 8______ the world into a small village. Hard work, not good luck, is the reason why the Wright Brothers could invent this convenient (方便的) machine and become great people. Today we will remember them when we see planes 9______ in the sky. Whenever I read 10______ about great people, I always learn a lot from them and they encourage me to march on. This is why I enjoy reading about great people's lives. |