问题
单项选择题
采用系统抽样方法，对150名14～16岁的男孩进行平均身高的检测，抽取1/3作为样本，下列说法错误的是( )。
A．样本量为50
B．K=150/50=3，可分50段，每段3人，取1人
C．每段均从高到矮排列，取最高者
D．将150名男孩进行编号，随机抽取一人做第K个人，再依次抽取第K+3人构成样本
答案
参考答案：C
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采用系统抽样方法，对150名14～16岁的男孩进行平均身高的检测，抽取1/3作为样本，下列说法错误的是( )。
A．样本量为50
B．K=150/50=3，可分50段，每段3人，取1人
C．每段均从高到矮排列，取最高者
D．将150名男孩进行编号，随机抽取一人做第K个人，再依次抽取第K+3人构成样本
参考答案：C
Andy is 13 years old. He is a student at Beijing Sunshine Secondary School. He is very good _________ Maths. After school, he likes _________ basketball __________ his friends. He is __________ the school basketball team. Andy ________ very _________. His _________ basketball player is David Smith. He always watches his games and listens __________ radio programmes about him. Today, he wants _______ write an article about David ________ the basketball Club newsletter. He found a radio programme about him. He is listening carefully and taking notes.
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