简述化学吸附的特征。
参考答案:
①吸附有很强的选择性;
②吸附速率较慢,达到吸附平衡需相当长的时间;
③升高温度可提高吸附速率。
We must remember that _____fashion is not the most important thing in _______ life.
A./; the
B./; /
C.the; /
D.the; the
对壶腹癌,最有价值的检查是
A.CT
B.B超
C.ERCP
D.PTC
E.DSA