水准测量中,调整微倾螺旋使管水准气泡居中的目的是使()。
A、竖轴竖直
B、视准轴水平
C、十字丝中横丝水平
D、十字丝中竖丝竖直
参考答案:A
She must be looking forward as much to his return as he himself is to ______her. [ ]
A. be seeing
B. have seen
C. see
D. seeing
在南京国民政府成立后,帝国主义在华的代理人是()