用于气体脱水的吸附过程一般为化学吸附。
参考答案:错
Now our school is four times ________ it was twenty years ago.
A.when
B.which
C.that
D.what
下列哪项不是耳眩晕的主症
A.天旋地转感
B.身体向一侧倾倒感
C.耳鸣耳聋
D.恶心呕吐
E.神志不清