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【单选题】
高度分化的植物细胞、组织和器官进行组织培养可以形成愈伤组织 ,下列叙述错误的是 A .该愈伤组织是细 胞经过 化和分裂形成的 B .该愈伤组织的细胞没有全能性 C .该愈伤组织是由排列疏松的细胞组成 D .该愈伤组织可以形成具有生根发芽能力的胚状结构A.
1
B.
2
C.
3
D.
4
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【简答题】I think it's very unkind of you to make up stories about him..
【简答题】脏象学说的主要特点是 （ ）
【单选题】His brothers and sisters all live close _____. It's easy for him to seek help.
A.
by
B.
down
C.
near
D.
up
【单选题】It's up to him to ________ this problem.
A.
make an effort
B.
sort out
C.
socialize
D.
sympathy
E.
out of time
【单选题】When a student gets behind, it's important for him to catch up quickly, otherwise he would be burdened with so much work that he will probably never get it done.
A.
Y
B.
N
C.
NG