逻顺序图法(PDM):()
A.只有完成到开始任务的关系
B.在节点上有工序
C.提供工序领先和滞后的灵活性
D.使用标准偏差计算工序工期的可能性
E.B和c
参考答案:E
过点P(-1,3)且垂直于直线x-2y+3=0的直线方程为______.
Finding the ______look on the student’ s face, the professor felt _____about his explanation.
A.confusing, embarrassed
B.confused, embarrassed
C.confused, embarrassing
D.confusing, embarrassing