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【单选题】
下列关于吸附法的叙述，说法错误的是( )。A.
吸附过程都是不可逆的
B.
吸附是气相分子被固体表面分子吸引的过程
C.
吸附剂经过一定使用时间后会饱和
D.
用作吸附剂的一般是比表面积很大的多孔性材料
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举一反三
【简答题】利用二维表表示数据及其联系的数据库是【 】数据库。
【单选题】1) What is Betty doing?
A.
She is eating a pizza
B.
She is cooking
C.
She is doing some housework
【简答题】试述利用Foxpro建立数据库时，数据库结构没计的基本步骤。
【简答题】What does Betty ask?
【简答题】Listen
to the recording again and answer the questions. 1. What
question does Dolly ask Betty about her hometown? 2. What
does Betty do? 3. Where
are Betty and Dolly from respectively? 4. What...
【简答题】What will Betty do this weekend?
【单选题】What did Betty do last Sunday?
A.
She eats a whole pizza.
B.
She listened the music.
C.
She played the volleyball.
D.
She played the piano.
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