问题
单项选择题
3名老师随机从3男3女共6人中各带2名学生进行实验，其中每名老师各带1名男生和1名女生的概率为（）。
A.A
B.B
C.C
D.D
E.E
答案
参考答案：A
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3名老师随机从3男3女共6人中各带2名学生进行实验，其中每名老师各带1名男生和1名女生的概率为（）。
A.A
B.B
C.C
D.D
E.E
参考答案：A
Nowadays, it is very for us to live a low-carbon life. The first thing we can do is bikes instead of driving cars. First, bikes are than cars and everyone can afford it .Second, it’s easier parking places for bikes. Third, the petrol is not necessary for bikes, so bikes won’t produce dirty air to make pollution to our environment. Finally, we can ride bikes to keep Let’s ride bikes instead of driving cars to protect the environment!
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