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【单选题】
指出下列植物器官属于变态茎的是（） ①荸荠 ②芋头 ③甘薯 ④马铃薯 ⑤洋葱 ⑥胡萝卜 ⑦水仙 ⑧藕A.
①②⑤⑦
B.
③④⑤⑥
C.
①②④⑧
D.
③④⑦⑧
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【简答题】Marc Edwards, an engineering professor, has been appointed by the Michigan Governor to deal with the water cr in Flint
【判断题】According to the Swiss linguist Saussure, langue refers to the abstract linguistic system shared by all the members of a speech community.
A.
正确
B.
错误
【单选题】下面哪一项不是某种商品供给曲线发生移动的原因?( )
A.
技术进步
B.
该商品自身价格变化
C.
生产该商品的一种生产要素价格发生变化
D.
生产者预期该商品价格会上升
【简答题】Flint residents trust Marc Edwards instead of the company the city wanted to hire to test the city’s water.
【简答题】社会助长是指有别人在场时，我们会（ ）。
【判断题】Langue refers to the abstract linguistic system shared by all the members of a speech community.
A.
正确
B.
错误
【简答题】Marc Edwards formed a water study team and spent a large amount of his own money on his research and investigation.
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