问题
填空题
如果M(a,2a-4)是第四象限的整数点,则点M的坐标为______.
答案
∵M(a,2a-4)是第四象限的点,
∴
,解得0<a<2,a>0 2a-4<0
∵a为整数,∴a=1,
则M(1,-2),
故答案为:(1,-2).
如果M(a,2a-4)是第四象限的整数点,则点M的坐标为______.
∵M(a,2a-4)是第四象限的点,
∴
,解得0<a<2,a>0 2a-4<0
∵a为整数,∴a=1,
则M(1,-2),
故答案为:(1,-2).
目前, 越来越多的中学生利用周末上各种各样的培训班或请家教。对于这一现象, 存在两种不同观点:
要求:层次清晰, 连贯流畅;表达灵活, 不要逐字逐句翻译。 参考词汇:巩固strengthen; Is a Training Class or Family Teacher Necessary? More and more middle school students are going to all kinds of training classes or having family teachers at the weekend. There are two different viewpoints about it. _________________________________________________________________________ |