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【判断题】
与一元函数类似,二元连续函数经过 四则运算 和 复合运算 后仍为 二元连续函数 。 由 和 的基本初等函数经过有限次的四则运算和复合运算所构成的可用一个式子表示的二元函数称为 二 元初等函数 。A.
正确
B.
错误
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举一反三
【单选题】She hardly ever eats ______ potatoes.
A.
or bread or
B.
both bread or
C.
bread or
D.
neither bread or
【单选题】She hardly ever eats ______ potatoes.
A.
bread not
B.
bread or
C.
neither bread or
D.
neither bread nor
【单选题】听力原文：W: Would you like some bread? M: No, thank you. I'm not used to eating bread in the morning. Q: What axe the two speakers doing now? (8)
A.
They are having breakfast.
B.
They are eating some fruit.
C.
They are preparing hot soup.
D.
They are drinking cold milk.
【单选题】—How much bread would you like? —__________. [ ]
A.
Three piece of breads
B.
Three pieces of bread
C.
Three pieces of breads
D.
Three piece of bread
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