皮皮学，免费搜题
登录
搜题
【简答题】
从全班12名男生中,选出4名男生参加校运会男子4x100接力比赛, (1)甲、都必须人选时,共有____种不同的选择方案; (2)甲、都不能入选时,共有____种不同的选择方案; (3)甲、中至少有1人人选时,共有____种不同的选择方案; (4)甲、中最多有1人人选时,共有____种不同的选择方案.(都用数字作答)
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】He also says there is less chance of cheating with the in-class variety. In 2012, 125 students at Harvard were caught up in a scandal when it was discovered they had cheated on a take-home exam for a ...
A.
Elderly students find it hard to keep up with the rapid changes in education.
B.
Some believe take-home exams may affect students' performance in other courses.
C.
In-class exams are believed to discourage cheating in exams.
D.
Most professors agree whether to give an in-class or a take-home exam depends on type of course being taught.
E.
The author dropped out of college some forty years ago.
F.
Some students think take-home exams will eat up their free time.
G.
Students who put off their work until the last moment often find the exams more difficult than they actually are.
【简答题】阅读下列材料．回答问题。 以下是一名老师的日记： 又到了3月5日学雷锋的时间了，学校要求每个班为周围的社区做一件好事。可我认为学雷锋不能图表现，只用一天的行动来表示一下，而应该制度化、经常化，把爱心献给那些真正需要帮助的人。我决定先在班上召开一个“我们应该怎样学雷锋”的主题班会，形成我们全班共同的意见，找到一致的办法。主题班会设计如下： 第一步：全体同学收集雷锋的动人事迹。 第二步：请学生代表宣讲...
【简答题】Cancer is a curse, but it can also be a gift, a lesson. I 1 that cancer doesn’t have to 2 you from doing what you love, and it 3 doesn’t have to kill you. It’s just another 4 , another 5 you have to j...
【单选题】Hopefully,though,in the future,we'll have one less hurdle___jump over.
A.
with
B.
on
C.
in
D.
to
【简答题】Cancer is a 1 , but it can also be a 2 , a 3 . I learned that cancer doesn’t 4 stop you from doing what you 5 , and it surely doesn’t have to 6 you. It’s just another obstacle, another hurdle you have...
【简答题】“我国工人阶级应该为全社会学雷锋、树新风作出榜样,让学习雷锋精神在祖国大地蔚然成风。希望你们努力践行社会主义核心价值观,积极向上向善,从“赠人玫瑰、手有余香”中感受善的力量,以实际行动书写新时代的雷锋故事,为实现中国梦有一分热发一分光。——”回忆起2014年3月5日收到回信那天,仍激动不已。“2014年2月初,我们爱心团队在深入学习系列重要讲话精神的过程中,认识到要实...
相关题目：