直肠肛管的生理功能是（）
A.单纯排便
B.吸收少量钠离子及排便
C.吸收多量液体及排便
D.吸收少量钾离子及排便
E.排便及吸收少量液体
参考答案：E
An example of scope verification is ______ .
A) review the performance of an installed software moduleB) managing changes to the project scheduleC) decomposing the WBS to a work package levelD) performing a benefit/cost analysis to determine if we should proceed with the project
哪些情况下要考虑采用弹簧先行复位机构？
