A:①代表的生物可能是二倍体,其每个染色体组含4条染色体
B:②代表的生物可能是二倍体,其每个染色体组含3条染色体
C:③代表的生物可能是单倍体,其每个染色体组含2条染色体
D:④代表的生物可能是单倍体,其每个染色体组含4条染色体
如图所示的实验装置中,极板A接地,平行板电容器的极板B与一个灵敏的静电计相接.将A极板向左移动,增大电容器两极板间的距离时,电容器所带的电量Q、电容C、两极间的电压U,电容器两极板间的场强E的变化情况是( )
B
Happy Middle School
We're a bilingual(双语的) school for children of 6~15.We want a cook,a library assistant, a sports coach and a language teacher.
Jobs
Ages
Languages
Skills(技能)
Others
cook
25~40
Chinese
can cook Chinese and Western food
healthy
library
assistant
20~35
Chinese,
English
can read different kinds of books
careful
sports
coach
20~40
Chinese,
major in(主修) P.E.
and strong
language
teacher
—
major in English