7.施工測量具有的功能之一是(      )

A.檢查施工                                                  

B.檢查設(shè)計

C.檢查地圖                                                  

D.服務(wù)設(shè)計

8.地形圖的等高距的選擇應(yīng)(      )

A.選得越大越好                                           

B.選得越小越好

C.與地形無關(guān)                                               

D.根據(jù)地形和比例尺選用

9.DJ₆經(jīng)緯儀水平角觀測采用測回法可以消除或減弱(      )

A.豎軸誤差                                                  

B.視差

C.視準軸誤差                                               

D.豎盤指標差

10.軸北與磁北之間的夾角稱為(      )

A.磁偏角                                                      

B.磁坐偏角

C.子午線收斂角                                           

D.方位角

11.將透明方格紙蒙在欲測面積的圖紙上，數(shù)出圖形上整方格數(shù)和不足一整格的目估整數(shù)，從而求得圖形面積，這種方法為(      )

A.透明方格法                                               

B.透明平行線法

C.求積儀法                                                  

D.斷面法

12.某直線的象限角為北東60°，則坐標方位角為(      )

A.60°                                                         

B.120°   

C.240°                                                        

D.300°