单项选择题设AB边距离为200.23m，方位角为121°23′36″，则AB边的x坐标增量为 A、－170.92 B、＋170.92 C、＋104.30 D、－104.30
单项选择题Travelers usually ______________ space while packing a luggage. A、maximize B、make the full use of C、both A and B are right D、minimize
