设地面有 A 、 B 两点相距80m,仪器在 A 、 B 两点的中间,测得高差 h AB = +0.468m,现将仪器搬到距 B 点3 m附近处,测得 A 尺读数为1.694m, B 尺读数为1.266m。问: (1) A 、 B 两点正确高差为多少? (2)视准轴与水准管轴的夹角 i 为多少? (3)如视线调水平? (4)如何使仪器满足水准管轴平行于视准轴?
【简答题】Rewrite the following sentences, changing verb forms from the indicative to the subjunctive mood. 1. A basic requirement for any business professional is that he / she is able to write clear business ...