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【单选题】
新生儿肺透明膜病的原因是A.
羊水吸入
B.
胎粪吸入
C.
窒息
D.
出生前感染
E.
肺泡表面活性物质生成不足
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【单选题】The dogs are always rubbing against the wall. Look at the dirty marks they’ve made.
A.
expressing disapproval or annoyance
B.
just to emphasize how often the action takes/took place
【单选题】German shepherds, which always make poor pets, are used in police work and as guide dogs for the blind. The statement is .
A.
a fact
B.
an opinion
C.
a mixture of fact and opinion
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【简答题】It seems that there’s a good reason why dogs are always seen as man’s best friend. Scientists have found that dogs are the only animals that can read emotion(情感)in faces much like humans. The finding ...
【简答题】The dog has often been an unselfish friend to man. It is always grateful to its . It helps man in many ways. Certain breeds of dogs are used in criminal investigations. They are trained to sniff...
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