A:农业合作化运动和人民公社化运动
B:土地改革和农业合作化运动
C:土地改革和家庭联产承包责任制
D:农业合作化运动和家庭联产承包责任制
Our school wants two good teachers _____ the School Art Festival.
下列能够遗传的变异是( )
①狗的不同毛色
②红绿色盲
③皮肤白化
④先天愚型
⑤无籽西瓜
⑥同品种、同质量的白菜种子,由于水肥条件不同,植株个头的大小不同.
—You must be very excited about going to England for further study.— , but I am afraid I won't do well because my English is poor.
请回答下列问题: