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【单选题】
Pocoyo bakes cookies and Pato grows vegetables. In which of the following c ases is it impossible for both Pocoyo and Pato to benefit from trade?A.
Pocoyo does not like vegetables and Pato does not like cookies.
B.
Pocoyo is better than Pato at baking cookies and Pato is better than Pocoyo at growing vegetables.
C.
Pato is better than Pocoyo at baking cookies and at growing vegetables.
D.
Both Pocoyo and Pato can benefit from trade in all of the above cases.
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皮皮学刷刷变学霸
举一反三
【简答题】根的初生木质部主要有()组成,其功能是运输水分和无机盐,初生韧皮部主要由()和()组成,其功能是运输有机物,初生木质部和初生韧皮部之间的薄壁细胞中,部分细胞将发育成为()。
【简答题】木质部可分为初生木质部和（）
【单选题】—Does it rain a lot in this area? —_______, it hardly ever rains; the climate is like that of a desert.
A.
What’s worse
B.
In other words
C.
On the contrary
D.
As a result
【单选题】During the Vietnam War, many young Americans ______ their country to avoid military service.
A.
flee
B.
fled
C.
fled to
D.
flee to
【简答题】初生木质部分为 和 。
【多选题】What devastating chemical weapons were used during the Vietnam war?
A.
Agent Orange (Dioxin)
B.
Arsenic
C.
Napalm
D.
Uranium
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