问题
填空题
在平面直角坐标系中,点P(—1,—2)关于原点对称点的坐标是_______.
答案
(1,2)
题目分析:关于原点对称点的坐标的特征:横坐标、纵坐标互为相反数.
点P(—1,—2)关于原点对称点的坐标是(1,2).
在平面直角坐标系中,点P(—1,—2)关于原点对称点的坐标是_______.
(1,2)
题目分析:关于原点对称点的坐标的特征:横坐标、纵坐标互为相反数.
点P(—1,—2)关于原点对称点的坐标是(1,2).
用方框内动词的适当形式填空. | |
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1. How long does it to get to school? 2. I can't come. I a really busy day. 3. Mr Green likes to bread. 4. Let's _ a banana milk shake. 5. some more salt to the popcorn, please. 6. You have to the banana before eating it. 7. Can you help me these tomatoes? 8. Don' t waste water into the river. 9. Next you need to all these things into the blender. 10. Finally, on the blender and you'll get some fruit salad. |