猜你喜欢
- 1When I go to sleep with my bedroom light on.=When I go to sleep,I always ____ my bedroom light __
- 2把“教室里很安静”改为比喻句
- 3如图，AB为⊙O的直径，半径OC⊥AB，D为AB延长线上一点，过D作⊙O的切线，E为切点，连接CE交AB于点F． （1）求证：DE=DF； （2）连AE，若OF=1，BF=3，求DE长．
- 4HE HEARD THE NEWS . HE RUSHED OUT OF THE ROOM.（分词作状语）______________________________________
- 5测DNA含量绘标准曲线时,怎么算DNA的浓度
- 6失去电子数相等的Na,Mg,Al,它们的物质的量之比是?
- 7There was no end of fun during tea.翻译
- 8She is a ( )( )name is Mary.我赶时间``
- 9已知两圆的圆心距是5，两圆的半径是方程4x2-20x+21=0的两实根，则两圆的位置关系是_．
- 10NAOH可以和H2S反应生成什么 化学方程式.