One reason that many colleges adopt the website is to ______.
A. provide their students with campus information
B. offer medical treatment to students in mental disorder
C. encourage their students to seek advice about depression
D. give their students various help they may need
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( )是市场机制的核心。
A. 竞争机制
B. 供求机制
C. 价格机制
D. 人才机制
( )是指在某个特定产业中相互关联的，在地理位置上相对集中的若干企业和机构的集合。
A. 产业关联
B. 产业整合
C. 产业积累
D. 产业集群
GC法固定液
A. 塔板高度与流动相流速关系式
B. 流动相需要高压泵才能输送
C. 电场强度增大，分离趋于完全
D. 十八烷基硅烷键合硅胶
E. 甲基硅橡胶SE-30或OV-1
Why do most pageants have a historical flavor
A. Because most pageants take place for celebration.
B. Many pageants take place for amusement.
C. A lot of pageants take place for religion.
D. Because pageants usually take place for competition.
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