七码必中一组的方法

简介：Of course, the three drill manuals of A, B and C have different performance requirements for soldiers. For example, for a five-kilometer cross-country run, the A level of the Right Ye Camp is thirty minutes, which is two quarters of an hour, and the B level of the Zuo Ye Camp is two quarters of an hour. Forty-five minutes, that is, three quarters of an hour, and the third level of the left whistle and the right whistle is fifty minutes.