自身输血的术中失血回输一般不超过（）。
A、2000ml
B、3000ml
C、4000ml
D、2500ml
E、1500ml
参考答案：B
白血病在儿童恶性肿瘤中占据
A．第1位B．第2位C．第4位D．第3位
Project Time Management includes the processes required to manage timely completion of the project, these processes interact with each other．______is following the process-Estimate Activity Durations．
A．Develop Schedule B．Estimate Activity Resources C．Define Activities D．Sequence Activities
