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【单选题】
下列各组物质，按化合物、单质、混合物顺序排列的是
A.
烧碱、液态氧、漂粉精
B.
熟石灰、白磷、胆矾
C.
干冰、碘酒、氯化氢
D.
空气、生石灰、赤铁矿
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参考答案：
A
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举一反三
What happens to nocturnal creatures because of light pollution?
A.
They go away from the cities.
B.
They go into people’s homes to find food.
C.
They can’t find the food they need.
D.
They are more likely to be eaten by other creatures.
Certain animals change their choice of food when ___________.
A.
the season changes
B.
the food color changes
C.
they move to different places
D.
they are attracted by different smells
In the story the relation（关系）of the big strong tree to the thin one is like that of ______.
A.
the young father to the old neighbor
B.
parents to their children
C.
the old neighbor to the children of the young father
D.
grown ups to their parents
We can infer from the text that humans and animals ____________.
A.
depend on one sense in choosing food
B.
are not satisfied with their food
C.
choose food in similar ways
D.
eat entirely different food
How can light pollution affect migratory birds?
A.
They will easily get lost on their way of migration.
B.
They will change their living habits.
C.
They cannot find food any more.
D.
They cannot fly over tall buildings.
相关题目：
What happens to nocturnal creatures because of light pollution?
A.
They go away from the cities.
B.
They go into people’s homes to find food.
C.
They can’t find the food they need.
D.
They are more likely to be eaten by other creatures.
Certain animals change their choice of food when ___________.
A.
the season changes
B.
the food color changes
C.
they move to different places
D.
they are attracted by different smells
In the story the relation（关系）of the big strong tree to the thin one is like that of ______.
A.
the young father to the old neighbor
B.
parents to their children
C.
the old neighbor to the children of the young father
D.
grown ups to their parents
We can infer from the text that humans and animals ____________.
A.
depend on one sense in choosing food
B.
are not satisfied with their food
C.
choose food in similar ways
D.
eat entirely different food
How can light pollution affect migratory birds?
A.
They will easily get lost on their way of migration.
B.
They will change their living habits.
C.
They cannot find food any more.
D.
They cannot fly over tall buildings.
参考解析：
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