以下哪一项不属于微孔滤膜滤过的特点( )
A.孔径均匀,孔隙率高、滤速高B.滤过阻力小C.滤过时无介质脱落D.不易堵塞E.可用于热敏性药物的除菌净化
参考答案:D
We can't put off _____a plan. [ ]
A. make
B. making
C. to make
D. made
合理的电网结构应满足哪些基本要求?