只要电梯使用单位领导同意你就可以()电梯。
参考答案:操作
公路桥梁的两端都有类似如图的标志(t是“吨”的符号,13t表示桥梁最大能承受质量为13t的物体的重力).一辆自身质量为5t的汽车,装有5m3的砖,已知ρ砖=2×103kg/m3,试通过计算说明它能否通过这座桥?
In the former Soviet Union several cases have been reported recently______people who can read and detect colors with their fingers, and even see through solid doors and walls.
A.of
B.on
C.about
D.with