问题
选择题
— I really like playing computer games!
— I'm afraid you _____ stop, for your study and your health. [ ]
A. can
B. will
C. may
D. must
答案
答案：D
搜题请搜索小程序“爱下问搜题”
— I really like playing computer games!
— I'm afraid you _____ stop, for your study and your health. [ ]
A. can
B. will
C. may
D. must
答案：D
为液面压强；
为计算点在坐标原点以下的深度；r为该点到旋转轴的距离。