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【单选题】
20世纪90年代，乌干达木薯业遭到了病害的毁灭性打击。科学家究其原因发现，是一种新的病毒引发的疾病，而这种新病毒是由两种已知病毒重组产生的。这一事实有力地支持了下列哪一观点 [ ]A.
转基因生物有可能成为“入侵的外来物种”，威胁生态系统中其他生物的生存
B.
导入转基因生物的外源基因有可能与感染转基因生物的某些细菌或病原体杂交，从而重组出对人类或其他生物有害的病原体
C.
转基因植物的抗除草剂基因，有可能通过花粉传播而进入杂草中，使杂草成为除不掉的“超级杂草”
D.
抗虫棉能抵抗棉铃虫，但随着棉铃虫抗性的增强，抗虫棉有可能被淘汰
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【单选题】I feel so tired. Let’s stop ________.
A.
have a rest
B.
to have a rest
C.
having a rest
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【多选题】According to learning pyramid, which of the following ways are active learning and can help students remember more than a half of what to be learned?
A.
Listening to lectures
B.
Reading
C.
Watching videos
D.
Watching demonstations
E.
Discussing in groups
F.
Practicing by doing
G.
Teaching others
【单选题】根据材料请回答 16～22 Plants and Mankind Botany, the study of plants, occupies a peculiar position in the history of human knowledge. We don't know what our Stone Age ancestors knew about plants, but from wha...
A.
Right
B.
Wrong
C.
Not mentioned
【单选题】The learning pyramid tells us that the most effective way of learning happens when we...
A.
teach other people
B.
practice something by doing it
C.
having something demonstrated to us
D.
are listening to lectures
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