[音频]
A. He feels sick.
B. He has hurt his leg.
C. He doesn't know he's slow.
D. He doesn't have energy to run.
[音频]
A. Talk to the coach.
B. Speak directly to Jimmy.
C. Speak to other teammates.
D. Leave a note on Jimmy's car.
2.下列调查适合普查的是( )
A. 了解某班统计学考试成绩
B. 了解 一批灯泡的使用寿命
C. 了解一批导弹的杀伤半径
D. 了解一批袋装食品是否含有防腐剂
统计与数学的区别就在于统计的结论不是百分百确定的,其结论具有一定的不确定性( )
A. 对
B. 错