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【单选题】
三铰拱的合理拱轴线是( )A.
无拉力
B.
无压力
C.
无扭矩
D.
无弯矩
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举一反三
【简答题】在Word的编辑状态，若要对当前文档中设置字符间距，可以使用格式菜单中的段落命令。（ ）
【单选题】Let's toss a coin to see who goes first.
A.
A piece of metal, usually flat and round, that is used as money.
B.
The other finding of the coin. A different or opposite way of thinking about something.
C.
To invent a new word or expression, especially one that many people start to use.
D.
To coin a phrase. used as a joke when one has just said something so familiar and ordinary that is a funny.
【单选题】Let’s toss a coin to see who goes first.
A.
n. a piece of metal, usually flat and round, hat is used a money
B.
n. [the other side of the coin] a different or opposite way of thinking about something
C.
v. to invent a new word or expression, especially one that many people start to use
D.
v. [to coin a phrase] used as a joke when one has just said something so familiar and ordinary that it is funny
【简答题】如果一个西瓜a元，苹果一个b元，买20个西瓜和100个苹果共用去______元．
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