Greatly moved by what she said, __________.

A．tears came to my eyes

B．he could hardly hold back his tears

C．my eyes were filled with tears

D．my heart was full of gratefulness

同航迹、同巡航高度、不同速度的航空器，前方航空器比后方航空器快40千米/小时以上，两架航空器飞越同一位置报告点后必须有（）分钟的时间间隔。

A.3

B.5

C.6

D.10