乳岩好发年龄为:()
A.20~30
B.30~40
C.20~40
D.40~60
E.60岁以上
参考答案:D
女性,48岁,原有风湿性心脏病联合瓣膜病变,10天来因发热、咳嗽、咯血住院,作哪项检查对诊断最有帮助()
A.血培养
B.心脏超声
C.胸部X线
D.血常规
E.心电图
PERT provides project managers with the following ______.
A) a basis for obtaining the necessary facts for decision makingB) the basic structure for the reporting of informationC) a graphical depiction of task internal-dependenciesD) A, B and C