题目内容：
在生产水稻等的杂交种时，需要建立两个隔离区。一个是回答区；一个是回答
区。
参考答案：
选择题：在生产水稻等的杂交种时，需要建立两个隔离区。一个是回答
- 题目分类：国家开放大学遗传育种学
- 题目类型：选择题
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区；一个是回答
区。
区；一个是回答
区。
钢筋混凝土结构井道不宜采用的电梯导轨架安装方式是( )。A. 焊接式B. 预埋螺栓式C. 埋入式D.
钢筋混凝土结构井道不宜采用的电梯导轨架安装方式是( )。A. 焊接式B. 预埋螺栓式C. 埋入式D. 对穿螺栓式
For which job do you need to write a letter in ord
For which job do you need to write a letter in order to get an application form?
The introduction of Christianity to Britain added
The introduction of Christianity to Britain added the first element of words to
钢拱架的性能特点？
钢拱架的性能特点？
The in the early 1970s worsened an already stagnan
The in the early 1970s worsened an already stagnant economy in Britain.A. oil cr