读一读，补全对话A. What do you want to be?B. What subject do you want to teach?C. Do you want to be a doctor

题干

读一读，补全对话

A. What do you want to be?

B. What subject do you want to teach?

C. Do you want to be a doctor?

D. I'm good at singing and dancing.

E. They help people.

Jerry: Hi, Linda. What do your parents do on Sunday?

Linda: They go to work on Sunday. They are doctors. ____

Jerry: ____

Linda: No, I don't.

Jerry: ____

Linda: I want to be a teacher. I want to teach children.

Jerry: ____

Linda: I want to teach Music. I like Music. ____

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E,C,A,B,D

某县八年级有3000名学生参加“爱我中华知识竞赛”活动．为了了解本次知识竞赛的成绩分布情况，从中随机抽取了部分学生的得分进行统计.请你根据不完整的表格，解答下列问题：

（1）补全频数分布表；
（2）随机抽取的样本容量为；
（3）若将得分转化为等级，规定50≤x＜60评为“D”，60≤x＜70评为“C”，70≤x＜90评为“B”，90≤x＜100评为“A”．估计这3000名学生中，有多少学生得分等级为A？