一组数据2,2,3,3,5,众数是 ,中位数是 .
2和3;3
∵数据2和3出现了2次,最多,
∴众数为2和3;
排序后该组数据为2,2,3,3,5,
∴中位数为3.
下图是细胞直接与内环境进行物质交换示意图,⑤处的箭头表示血液流动的方向。下列说法正确的是
A.若③为胰岛B细胞,饭后半小时⑤处的胰岛素浓度高于①
B.若③为脑细胞,⑤处的氧气浓度低于①处,而CO2的浓度相反
C.若③为骨骼肌细胞,饭后五小时⑤处的血糖浓度低于①处
D.若③为组织细胞,其生活的具体内环境中的水可来自于③和⑤
Look at the pride look on Ben's face. He _____ by the teacher just now. [ ]
A. seemed to be praised
B. seems to have been praised
C. seemed to have been praised
D. seems to be praised