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【简答题】
自交系品种特点; A. 群体遗传组成基本同质，个体基本纯合。
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举一反三
【单选题】Fear showed in the eyes of the young man,while the old man looked tired and_____.
A.
watery
B.
wandering
C.
weary
D.
wearing
【单选题】The old man looked out of the window and found the trees ______ in the cold wind.
A.
swaying
B.
shaking
C.
quivering
D.
trembling
【单选题】The old man looked at the photo to his memory of the days when he lived in the countryside. [ ]
A.
remember
B.
refresh
C.
remind
D.
recall
【单选题】The old man looked up towards the moon and seemed, judging from his facial expression, ______ of his family.
A.
to think
B.
thinking
C.
to have thought
D.
to be thinking
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