“一母生九子,连母十个样”这句俗语反映的生物现象是( )
A:遗传
B:变异
C:生殖
D:发育
下列常见符号表示阴天的天气是( )
-Shall we go for a picnic tomorrow?
-Well, it all ____________ the weather.
①Jane blackboard morning look at open the door sit down
②Please look at the window. OK, Miss Fang.