问题
填空题
计算：
|
答案
设20012000=x，则
原式=
=x2 (x-1)2+(x+1)2-2
．1 2
故本题答案为
．1 2
搜题请搜索小程序“爱下问搜题”
计算：
|
设20012000=x，则
原式=
=x2 (x-1)2+(x+1)2-2
．1 2
故本题答案为
．1 2
| 阅读理解。 | |
| |
| We often hear that children wish they were grown-ups, and that old people wish they were young. 1 The happiest people enjoy what each age gives them without wasting their time in useless regrets. 2 A child is fed, looked after and loved by all grown-ups like parents or grandparents. 3 However, for older people they often lose their interest in those things. On the other hand, a child may also have some pains with him. 4 He is often told not to do something. He will certainly be shouted at for doing something wrong. When a child grows up, he can no longer expect others to pay for his food, clothes and many other things. 5 If he still spends most of his time playing as he used to in childhood, he will go hungry. If, however, he works hard and has no trouble, he can build up his own position in society with great happiness. | |
| 1. 2. 3. 4. 5. |