1.星期一上午六一班有47人到教室上课,有2人请病假,还有1人请事假,求这天的出勤率?

1．A 2．B

我是一名护士,今天早上Mr.Croft来到了我们的医院,他说他牙疼,但是没有预约,我让他在四月二十四日星期一上午十点钟来,他说今天他想见医生,我又让他下午两点钟来,他又说我倒是可以的.可是他的牙疼等不了.
I am a nurse.Mr.Crost came to our hospital this morning.He said that he had a toothache,but he didn't have an appointment.So I asked him to come here at ten o'clock on Monday,April 24th.He said he wanted to see the doctor.I asked him to come at two in the afternoon,he said it was OK.However,he couldn't wait anymore because of his toothache.

On Monday Morning

如果上午四节课,则有4*3*2＝24种方法,如果是上午三节课,则有3*2*1＝6种排法.

I am sorry, Miss Liu, I can't see you in the Monday morrning, I know your time is precious, but there are some things I have to do. Asked miss liu pardon!
your student
刘老师,对不起,我不能在星期一早上去见你,我知道你的时间很宝贵,但有一些事情我一定要去解决.请求刘老师的原谅!
你的学生
嗯~(⊙_⊙),字数不够,不过没关系,主要就这些了,你可以在添加一些内容O(∩_∩)O~~

29+24-10+3=46（人）

解题思路：此题需要两步完成，所以采用树状图法或者采用列表法都比较简单；解题时要注意是放回实验还是不放回实验，此题属于放回实验．要注意根据题意列表．列举出所有情况，看星期一上午有英语的情况数占总情况数的多少即可．

设数学、语文、英语、计算机分别为A、B、C、D，列表得：

∴一共有10种情况，星期一上午有英语的有6种情况，
∴星期一上午有英语的概率为[6/10]=[3/5]．

点评：
本题考点： 列表法与树状图法．

考点点评： 用到的知识点为：概率=所求情况数与总情况数之比．

We are very glad to receive your reply.
The arrangement
Dr.zhang said that he would like to invite you to dinner on sunday night.
Dr.luo said that he will come to shanghai from wuhan,and then hold a meeting.
Hope you enjoy your time in ShangHai!

Every Monday morning we must wear school uniform

我下的天气预报说这两天都是多云转阴

The next week go toes the farm labors,and the farm leave here to not far can go on foot,and I plan to set out in the morning on Monday,and labor 2 3 days there,and take off the apple with farmer togethe

29+24-10+3=46

29+24-10+3=46人

乘法原理.

语气委婉、以理服人、拒绝抄袭.（意对即可）

in