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【多选题】
下列情形中，哪些构成不当得利：（）A.
甲将乙丢弃的病牛拾回家，经精心治疗病牛痊愈
B.
甲研究所从乙工厂堆放在厂外的废料中提取贵重物品而获利
C.
甲捡到乙的一块手表，而拿回家自己用
D.
甲鱼塘的鱼跳入乙鱼塘
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举一反三
【多选题】We can call America __________.
A.
the United States of America
B.
America
C.
the United States
D.
U.S.A
【简答题】林则徐爱国思想的核心仍然是 。
【单选题】I said nothing. I was going to let him___himself___.
A.
talk back
B.
talk of
C.
talk into
D.
talk out
【多选题】ɑi ei ɑo ou四个复韵母的发音有何特点?
A.
发音时，口腔开口度由大到小逐渐变化。
B.
开头的元音发得响亮、清晰，时间较长，后面的元音轻而短。
C.
发音时元音之间会相互影响而发生变化。
D.
ao ou 两个韵母，归音都是 u 。
【单选题】We can learn from the text that the author believes
A.
America will be the first country to solve the supply problem of human kidneys.
B.
governments should make organ donations a compulsory act instead of a voluntary one.
C.
it makes sense to stop individuals from selling organs because the idea is very repulsive.
D.
the supply problem of human kidneys can be resolved with appropriate regulation.
【简答题】I knew they were _______ curiosity but I said nothing.
【单选题】We can conclude that ______ .
A.
education has no national boundary
B.
America attaches greater importance to education than Britain
C.
students in America receive better education than in Britain
D.
failure in education might lead to huge loss of both money and human resources
【单选题】According to the passage, we can infer that ______.
A.
the present ozone level in America is safe to people
B.
there is no direct connection between ozone and death rates
C.
the study of ozone and death rates has been done several times
D.
America has a worse problem with ozone than other countries
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