警冲标应设在两会合线路线间距离为（）m的中间，有曲线时按限界加宽办法加宽。

A. “勾”“皴”“染”“描”
B. “勾”“皴”“染”“点”
C. 勾线、罩染、涂色
D. 写生、勾线、染色

A. the best fix is obtained by using a tangent bearing and a range
B. and using two radar ranges for a fix，the objects of the ranges should be close to reciprocal bearings
C. and using ranges，the most rapidly changing range should be measured last
D. and crossing a radar range of one object with the visual bearing of a second object，the two objects should be 80°to 110°apart

A. 脱离
B. 解析
C. 分离
D. 凝聚