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- 1按正确形式填空They ( ) (have) an English class this morning.
- 2playing sports is the best way to keep healthy 为什么是to keep,又可以得到什么用法
- 3I don\'t want to say with you too
- 4How mush time does your family spend on t_____.
- 5I like these trees.(改为一般疑问句,并做两种回答)
- 6next to me_____________help me do housework___________ like to learn the pione_________
- 7某项工程,需在规定的时间内完成,若工人减少6人,则工时增加12天;若工人增加4人,则工时减少4天.试求规定的时间和原来的人数.
- 8已知二次函数y=ax2+bx+c(a≠0)的最大值为0,则( ) A.a>0,b2-4ac=0 B.a<0,b2-4ac>0 C.a>0,b2-4ac<0 D.a<0,b2-4ac=0
- 9D,E分别在三角形ABC的AB,AC上,BD=CE,M.N分别为BE,CD中点,MN的反向延长线分别叫AB,AC与点P,O,求AP=AQ
- 10f(x)=(㏑x+k)/e的x次方,的导数怎么求