黄连中的小檗碱
A．镇痛作用B．抗癌活性C．抗菌消炎作用D．抗中毒性休克作用E．具有拟胆碱作用 与上述生理活性相对应的生物碱是
参考答案：C
命题：“若a＞0，则a2＞0”的否命题是（ ）
A．若a2＞0，则a＞0
B．若a＜0，则a2＜0
C．若a≤0，则a2≤0
D．若a≤0，则a2≤0
The identification, definition and selection of the project objectives, as well as the best approach to achieving the project objectives, are identified in the （） process of the project and documented in the project （）.
A．initiation (authorization), charter
B．initiation (authorization), scope statement
C．scope definition, scope statement
D．scope planning, charter
