问题
选择题
—Oh, there isn't enough ______ for us in the lift.
—No hurry. Let's wait for the next. [ ]
A. floor
B. ground
C. room
D. place
答案
答案：D
搜题请搜索小程序“爱下问搜题”
—Oh, there isn't enough ______ for us in the lift.
—No hurry. Let's wait for the next. [ ]
A. floor
B. ground
C. room
D. place
答案：D
，竖直向下的磁场磁感应强度大小随坐标x的变化关系如图乙所示．开始导体棒CD静止在导轨上的x=0处，现给导体棒一水平向右的拉力，使导体棒以lm/s2的加速度沿x轴匀加速运动，已知导体棒质量为2kg，电阻为2