问题
填空题
若m、n满足|m-n|+(n+1)2=0,则m+n=______.
答案
根据题意,得:
,解得m-n=0 n+1=0
.故m+n=-1-1=-2.m=-1 n=-1
若m、n满足|m-n|+(n+1)2=0,则m+n=______.
根据题意,得:
,解得m-n=0 n+1=0
.故m+n=-1-1=-2.m=-1 n=-1
完型填空。 | ||||
I think the best place to go on Sunday is the zoo. When you are __1__, you can go there with your family. __2__ the zoo, there are many animals: elephants, deer, __3__, rabbits and other animals. Elephants are the __4__ animals on land. I __ 5__ there is a baby elephant in our zoo. So I want to __6__at it. Yu Xuan wants to go with me. She says, " __7__we go there together?" "Sure!" I say. " We can __8__ a good time there. But let's __9__ there at half past four. I have __10__ homework to do." | ||||
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