一组小鼠的生存天数分别为2.9,1.4,0.7,8.4,10.2.其中位数为()
A.2.9
B.1.4
C.0.7
D.8.4
E.10.2
参考答案:A
地面、墙壁、家具消毒可用下列哪些溶液擦拭()
A.1%~3%含氯石灰溶液
B.0.2~0.5%过氧乙酸溶液
C.1000mg/L~2000mg/L含氯消毒剂
D.0.2%氯己定溶液
E.0.5%氯胺T溶液
The teacher is very popular his students.[ ]
A. between
B. among
C. from
D. through