下列哪个活动和制定项目章程无关（）
A.项目论证
B.收集规划过程组的输出
C.理解客户的需求
D.记录商业需求
参考答案：B
In those days, our ________ concern was to provide people who were stopped by the snow storm with food and health care.
A．normal
B．constant
C．permanent
D．primary
一环形线圈放在匀强磁场中，设第1s内磁感线垂直线圈平面（即垂直于纸面）向里，如图甲所示，磁感应强度随时间变化的关系如图乙所示，那么关于第2s内线圈中感应电流I和各处所受安培力F的判断正确的是（ ）
A．I沿顺时针方向，F沿着圆半径指向圆心
B．I沿顺时针方向，F沿着圆半径背离圆心
C．I沿逆时针方向，F沿着圆半径指向圆心
D．I沿逆时针方向，F沿着圆半径背离圆心
In those days, our ________ concern was to provide people who were stopped by the snow storm with food and health care.