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【单选题】
According to the speaker, libraries are facing the problem of ______.A.
books are in poor condition
B.
having too many books from the early 1800s
C.
not having enough space to store government documents
D.
having to import most of the paper they use
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【简答题】函数y= 2 x-1 中自变量x的取值范围是______；函数y= 2x-4 中自变量x的取值范围是______．
【单选题】Why does cream go bad faster than butter? Some researchers think they have the answer, and it comes down to the structure of the food, not its chemical composition--a finding that could help rid some ...
A.
it suggested a way to keep some foods fresh without preservatives
B.
it discovered tiny globules in both cream and butter
C.
it revealed the secret of how bacteria multiply in cream and butter
D.
it found that cream and butter share the same chemical composition
【单选题】Why does Maria go into the mobile ice-cream business?
A.
To preserve a tradition.
B.
To amuse her daughter.
C.
To help local education.
D.
To make some extra money.
【简答题】函数y= 中自变量x的取值范围是
【简答题】函数y= 中自变量x的取值范围是
【简答题】函数 y= 2 x-2 中自变量x的取值范围是______，函数 y= 2x-3 中自变量x的取值范围是______．
【简答题】目前我国采用的复式记账法是（ ）。
【简答题】函数 y= 3 x-4 中自变量x的取值范围是______，函数 y= 3x-9 中自变量x的取值范围是______．
【单选题】Why does cream go bad faster than butter? Some researchers think they found the answer, and it comes down to the structure of the food,not its chemical composition--a finding that could help rid some ...
A.
it suggested a way to keep some foods fresh without preservatives
B.
it discovered tiny globules in both cream and butter
C.
it revealed the secret of how bacteria multiply in cream and butter
D.
it found that cream and butter share the same chemical composition
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