A:6:13
B:5:12
C:7:15
D:5:13
某饮料公司生产多种饮料,为了了解大众更喜欢哪种饮料,公司组织了“你投票,我送礼”的活动,投票者只要在选票所列举的每种饮料后都写上一个1到10之间的评价数即可获利,活动结束后,在平均数、众数、中位数和方差四个统计量中,公司应该关注的一个统计量是____.
Today is Saturday. The weather is warm and sunny. Bob and Jack go to the park. There are many people there. The girl under a big tree is reading a book. Two boys are playing football on the grass. The girl in a red dress is riding a bike. Two women are talking. The man beside these women is playing with a baby. Bob and Jack are beside the river. They are sitting on the chair and drawing pictures.
P1:函数f(x)=lgx﹣|x﹣2|有2个零点.
P2:面值为3分和5分的邮票可支付任何n(n>7,n∈N)分的邮资.
P3:若a+b=c+d=2,ac+bd>4,则a、b、c、d中至少有1个为负数.
那么,这3个命题中,真命题的个数是( )
路透社称中国队1:0战胜沙特队是2015年亚洲杯开赛以来的第一个真正的冷门.如图是运动员比赛中跳起争球的瞬间,下列有关说法错误的是( )
下列属于侵犯公民隐私权的是 ( )