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【多选题】
数据库进行数据管理的特点有( )。多选A.
实现数据共享
B.
减少数据的冗余度
C.
数据的独立性
D.
数据实现集中控制
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【单选题】Many black Americans prefer to be called 'African Americans' instead of 'blacks' because ______ .
A.
they want to be equal to the whites
B.
they want to identify with their African heritage
C.
they want to be politically correct
D.
they want to improve their social status
【简答题】Americans plan parties for many reasons. As in other cultures, many Americans attend parties for weddings and religious or national holidays. But some parties are especially American. For example, a g...
【简答题】Advanced technologies will soon make usual many transactions and exchanges on the Internet.
【单选题】Many good friends have a lot in _______.
A.
similarity
B.
difference
C.
common
D.
usual
【简答题】Many Americans are happy with this kind of marriage. But some other Americans have a different impression of marriage and family responsibilities.
【简答题】按法是指用手指、全掌或（ ）着力按压一定部位的方法。
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