问题
选择题
This is the only way that I can think of _______ the problem of water waste in urban areas. [ ]
A. settling
B. to settle
C. settle
D. settled
答案
答案：B
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This is the only way that I can think of _______ the problem of water waste in urban areas. [ ]
A. settling
B. to settle
C. settle
D. settled
答案：B
，粗细均匀的光滑导体棒EF（垂直于CD）在外力作用下以垂直于自身的速度V向右匀速运动，
