A:图①②③④表示一个完整的细胞周期
B:若按分裂的先后顺序排列,应为①→④→③→②
C:该细胞图②中有中心体、线粒体和高尔基体参与活动
D:该细胞图①中有同源染色体的配对,图③过程发生了基因重组
These are Cara and Ben. They are twins (双胞胎). They are twelve. This is their bedroom. It's a nice room. There are two beds in the room. The yellow bed is Cara's and that green one is Ben's. The twins have one desk and two chairs. The chairs look the same. Cara's sweater is on his bed. Ben's coat is on his chair. Their clock, books and pencil-boxes are on the desk. Their schoolbags are behind the chairs.
“接受义务教育的学生只享受权利不承担义务。”这种说法对吗?为什么?
以下是KCl部分溶解度数据,下列说法中正确的是( )
温度/℃
0
20
40
60
溶解度/g
27.6
34.0
40.0
45.5