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- 1The girl that we saw yesterday was Jim's sister.和Yesterday we saw a girl who was Jim's sister.
- 2"what does one time,it'll happen,i promise."mean?
- 3.--- Mum,I have won the first prize in the speech competition.--- _____!A Good luck B Come on C G
- 4His sudden__(arrive) made all of us surprise
- 5椭圆x2a2+y2b2=1(a>b>0)的四个顶点为A、B、C、D,若四边形ABCD的内切圆恰好过椭圆的焦点,则椭圆的离心率等于( ) A.22 B.5+12 C.5−12 D.3−52
- 6(根据题干所给信息在空格处填上一个恰当的词)
- 7在三角形ABC中,sinC-cosC+sinB=根号3 ,且角A≥四分之派,则sinB=?
- 8在半径为2cm的圆O中,弦AB的弦心距为1cm,那么劣弧AB的度数为
- 9我为妈妈烧菜872字四年级作文
- 10LiMn2O4中Mn的价态