A:衰亡期
B:对数期
C:调整期
D:稳定期
写出下列各词的反义词。
低劣—____ 拒绝—____
某种植物细胞常染色体上的A、B、T基因对a、b、t完全显性,让红花(A)高茎(B)圆形果(T)植株与隐性性状的白花矮茎长形果植株测交,子一代的表现型及其比例是:红花矮茎圆形果:白花高茎圆形果:红花矮茎长形果:白花高茎长形果=1:1:1:1,则下列正确表示亲代红花高茎圆形果的基因型的是( )
A
Linda,14
My mother does most of the housework like cooking and folding the clothes.My father can only do the washing,sweep the floor and take out the rubbish.He really needs to learn how to do the housework.
Celina,13
My mother and my father do 50% of the housework each.My mother does the washing and cleans the living room.My father makes the bed and drives me to school.
Paul,16
My father doesn't do a lot but he tries to help.He hangs__up the clothes after my mother washes them and my mother is happy that he always gives her a hand.
Bill,15
My mother is a doctor.She is busy with her work every day,so she has little time to do the housework.In fact,she isn't good at doing it.So my father has to do most of it.Sometimes my grandmother comes to help.