【名词&注释】
生活力(viability)、环境条件(environmental condition)、自然界(nature)、自花传粉(self pollination)、异花传粉(cross pollination)
[单选题]自花传粉现象在自然界得以保存，是因为它( )。
A. 比异花传粉(cross pollination)进化
B. 能增强后代生活力
C. 能保持种系特征的稳定
D. 是对环境条件的适应
查看答案&解析
点击获取本科目所有试题
举一反三：
[单选题]What does the man mean?
A. It will take about one month to repair the watch.
B. It costs too much to have the watch repaired.
C. The watch is no longer worth repairing.
[单选题]
A. borrow
B. earn
C. raise
D. collect
[单选题]47___
A. easily
B. carefully
C. confidently
D. proudly
[单选题]Food poisoning can be caused by all the following EXCEPT________.
A. some chemicals
B. low temperatures
C. some tiny living things
D. certain natural materials
[单选题]This text is most probably taken from_
A. a research paper
B. a newspaper report
C. a class presentation
D. a geography textbook.
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