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【简答题】

笼子里有，数数头一共11个，数数腿一共40条，笼子里有各几只？

题目标签：笼子鸡兔
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【单选题】笼子里有鸡，鸭，鹅三种动物，共10只，由此可以推出（）。
A.
笼子里至多有一种动物多于3只
B.
笼子里任意两种动物的总数不超过9只
C.
笼子里至多有一种动物少于3只
D.
笼子里至少有一种动物少于3只
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【简答题】鸟笼子理论
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【多选题】竹笼子埝是用( )按—定的工艺编织而成。
A.
竹料
B.
土料
C.
土袋
D.
钢筋
E.
铅丝
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【单选题】Mr. Black was young and able. The boss liked him. Last month he was sent to China on business. Before he went back from China, he decided to boy something for Tony, the son of his boss. At first he di...
A.
the three Chinese birds didn’t know English
B.
it was different from the Chinese birds
C.
he was making a joke
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【简答题】笼子的鸡和兔，共10个头，34只脚，其中鸡有______只，兔有______只．
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【简答题】笼子里有，数数头一共11个，数数腿一共40条，笼子里有各几只？
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【简答题】Years ago, many zoos kept all kinds of animals in small cages(笼子). Small cages made it easy for people to see the animals, but a small cage is not a good place for an animal to live in. Today zoos ke...
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【单选题】“On no account _____ to feed the animals,” the warning can be seen on the signboard on front of every cage (笼子)．
A.
allow visitors
B.
are visitors allowed
C.
visitors are allowed
D.
are allowed visitors
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【单选题】Mr. Black was young and able. The boss liked him. Last month he was sent to China on business. Before he went back from China, he decided to boy something for Tony, the son of his boss. At first he di...
A.
[A] By train. [B] By ship. [C] By plane.
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【简答题】笼式调节阀的笼子起什么作用？
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