包合物制备中，β—CD比α—CD、γ一CD更为常用的原因是()
A. 毒性最低
B. 形成的空洞最大
C. 分子量最小
D. 最易从水中析出结晶
E. 溶解度最大
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Some large economies devalue the currency to
A. decrease inflation.
B. boost exports.
C. revive economic growth.
D. start a trade war.
The Constitutional monarchy of Britain began since______.
A. 1689 after the Glorious Revolution
B. 1640 after the Civil Wars
C. 1660 after the Restoration
D. 1603 by the end of Elizabeth I"s rule
What is the passage mainly about？
A casual chat among drinkers in some pubs in Koreatown.
B. An academic speech about pub cultures in Koreatown.
C. An informative introduction about Koreatown pubs.
D. An insightful discussion about pub features among a research group.
Which of the following universities is the oldest one in the United Kingdom？
A. University of Oxford
B. University of Cambridge
C. University of Birmingham
D. University of Edinburgh
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