搜题请搜索小程序“爱下问搜题”
问题
填空题
若|x-3|+(y+5)
2
=0,那么x-y=______.
答案
∵|x-3|+(y+5)
2
=0;
∴x-3=0,y+5=0,
解得x=3,y=-5;
故x-y=8.
填空题
从方框中选择合适的单词,并用其适当形式填空。
invent, heat, operate, battery, bulb
1. I need to change the two ______in the camera.
2. The machine was ______by the old engineer in 1992.
3. Can you ______this machine?
4. Uncover the bottle when you ______the milk in the microwave on.
5. Edison invented the light ______.
查看答案
问答题 简答题
何谓“形气之辨”?
查看答案