【简答题】数学课上老师出了一道题,计算:(2a n+5 -3a n+4 -4a n+3 )÷(-5a n-1 )。小明解题过程如下: 同学们,你们能找到小明的错误,并给出正确答案吗?
【简答题】一次测验共有5道题,做对1道题得1分,已知26人的平均分超过4.8分,其中有3人得4分,最低分3分,则得5分的有 ______人.
【单选题】三人独立破译一密码,他们能单独译出的概率分别为1/5,1/3,1/4,则此密码被译出的概率是
【简答题】阅读理解。 David got a job in a police station after he left school. He worked there for 42 years and he'll retire this year. He worked hard in the past 42 years. But he was not a lucky man. He failed to c...
【简答题】一次测验共有5道题,做对1道题得1分,已知26人的平均分超过 分,其中有3人得4分,最低分3分,则得5分的有( )人
【单选题】无领导小组讨论中,一组被评人的数量为( )。[201 1年5月二级真题]
【简答题】阅读短文,根据短文内容判断所给句子正(T)误(F)。 David got a job in a police station after he left school. He worked there for 42 years and he’ll retire this year. He worked hard in the past 42 years. But he was not a luck...
【简答题】阅读短文,根据短文内容判断所给句子正(T)误(F)。(共5小题,每小题2分) David got a job in a police station after he left school. He worked there for 42 years and he’ll retire this year. He worked hard in the past 42 years. But he wa...
【简答题】一次测验共有5道题,做对1道题得1分,已知26人的平均分超过4.8分,其中有3人得4分,最低分3分,则得5分的有( )人.
【单选题】He worked quietly no one knew he was there.