产生卵细胞、形成受精卵、胚胎发育、胎儿和母体物质交换的场所分别是( )
A:卵巢、输卵管、子宫、胎盘
B:卵巢、阴道、子宫、胎盘
C:输卵管、子宫、卵巢、胎盘
D:卵巢、子宫、子宫、胎盘
将某活组织放入适宜的完全营养液中,置于适宜条件下培养。培养液中甲、乙两种离子的浓度保持相等且恒定,定期测得细胞中两种离子的含量得到如图所示曲线。据图分析下列叙述中正确的是( )
如图,点C,F在线段BE上,BF=EC,∠1=∠2,请你添加一个条件,使△ABC≌△DEF,并加以证明.(不再添加辅助线和字母)
①Are they under the table?
②My mother is in the kitchen.
③Is she in the living room?
④Where are my glasses?
⑤No, they aren't.They are in the door.
⑥My sister is in her bedroom.