火车从甲站到乙站的正常行驶速度是16m/s,有一次火车从甲站开出,由于迟开了300s,司机把速度提高到72km/h才刚好正点到达乙站,求:甲、乙两站的距离是多少?
S=24km
The information you give in the application is too general. You should _____ something special about yourself. [ ]
A. spy on
B. rely on
C. focus on
D. cut back on
针尖样瞳孔是指瞳孔直径小于()。
A.1mm
B.2mm
C.2.5mm
D.5mm
E.6mm