【单选题】【消耗次数：1】
下列各项中，关于运算符的优先级次的排序正确的是( )。
①
冒号、负数、逗号、百分比
②
冒号、逗号、负数、百分比
③
负数、冒号、逗号、百分比
④
负数、冒号、百分比、逗号
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【简答题】
敏感系数等于目标值变动百分比除以[填空] 。
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had impressed
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impressed
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has impressed
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it marked
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marking
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marked
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to mark
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morebad
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alittleworse
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①
dont;had
②
didnt;have
③
didnt;had
④
dont;have
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①
has;was asked
②
have;were asked
③
had;is asked
④
had;was asked
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①
none
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neither
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anything
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①
tried;to be left;
②
had tried to;leaving
③
tried to;left
④
had tried;have left