问题
选择题
—Why don't you go to the shop on foot?
—It takes me _______ time.
A. much too
B. too much
C. very much
D. too many
答案
答案：B
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—Why don't you go to the shop on foot?
—It takes me _______ time.
A. much too
B. too much
C. very much
D. too many
答案：B
人电场.已知油滴质量为m，重力加速度为g，当油滴到达运动轨迹的最高点B时，测得它的速度大小恰为v/2，问: