问题
单项选择题
要从三男两女中安排两人周日值班，至少有一名女职员参加，有多少种不同的安排方法（）
A．7
B．10
C．14
D．20
答案
参考答案：A
解析：
最基本的组合题。不同的安排方法至少有：
(种)。故选A。
搜题请搜索小程序“爱下问搜题”
要从三男两女中安排两人周日值班，至少有一名女职员参加，有多少种不同的安排方法（）
A．7
B．10
C．14
D．20
参考答案：A
解析：
最基本的组合题。不同的安排方法至少有：(种)。故选A。
This is a special class in a Chinese school. The students come from countries. Some come from America. come from Canada, Germany, Australia and England. They different languages, but all of can speak Chinese. They are good friends. They together, play together and live together. They help each other. All of the of this class are Chinese, but they can speak English, too. They help their students Chinese. They are very kind helpful. They work hard. All the students this class study Chinese cooking, so they can make delicious meals. All the students say that they are here. They also say China is a great country and the Chinese people are very friendly.
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