A:三棱柱
B:三棱台
C:三棱锥
D:四棱锥
Are you a sports lover looking for skill development in the off-season?
Joy of the Game (JG) has been working for the past 10 years. Come and join JG to develop skills as you prepare for the next season.
Classroom Information
Ages
Boys 8th—12th Grade
Skills
All Skill Levels
Days
Sunday (A 10—week Program)
Half Day: Morning: 9:00 am—12:00 pm
Afternoon:1:00 am—4:00 pm
Sample
Schedule
Morning Period: (9:00 am—12:00 pm): Basketball, Volleyball, Floor Hockey
Lunch Break: 12:00 pm—1:00 pm (Kids Must Bring Their Own Lunch)
Afternoon Period: (1:00 pm—4:00 pm): Basketball, Floor Hockey, Soccer, Relay Races
Costs
Half Day: $ 50 per day
Full Day: $ 90 per day
用调节好的托盘天平称量10.2g食盐,加入食盐后发现指针稍微偏左,接下来的操作应该是 ( )
满足sin3π-x=32,x∈﹣2π,2π的x的集合是____
下面有三个推断:
①当投掷次数是500时,计算机记录“钉尖向上”的次数是308,所以“钉尖向上”的概率是0.616;
②随着试验次数的增加,“钉尖向上”的频率总在0.618附近摆动,显示出一定的稳定性,可以估计“钉尖向上”的概率是0.618;
③若再次用计算机模拟此实验,则当投掷次数为1000时,“钉尖向上”的频率一定是0.620.
其中合理的是( )