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【单选题】
下图为将胡萝卜的离体组织在一定条件下培育形成试管苗的过程示意图。有关叙述正确的是 [ ]A.
利用此过程获得的试管苗可能为杂合子
B.
①②过程中都会发生细胞的增殖和分化
C.
多倍体植株的培育需经过如图所示过程
D.
此过程依据的生物学原理是细胞膜具有流动性
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反馈参考答案：
举一反三
【简答题】“你有一种思想, 我也有一种思想, 彼此交换,每人至少有两种思想”, 这体现了信息的( )
【单选题】What can you do if the international line is engaged?
A.
Ask the operator to call you back later.
B.
Make a 'person-to-person' call.
C.
Call back outside office hours.
D.
Walt and call again when the line is free.
【单选题】What can you do if the international line is engaged?
A.
Ask the operator to call you back later.
B.
Make a 'person-to-person' call.
C.
Call back outside office hours.
D.
Wait and call again when the line is free.
【单选题】If you miss a class, what should you do to find out what assignment was given?
A.
Call the teacher or a classmate.
B.
Give an excuse.
C.
Remind the teacher you were absent.
D.
Ask a classmate when you attend the school.
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