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【单选题】
下面规则中，不正确的是 （ ）。A.
若X→Y，WY→Z，则XW→Z
B.
若X→Y，Y→Z，则XY→Z
C.
若XY→Z，则X→Z，Y→Z
D.
若X→Y，则Y→Z，刚X→Z
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【简答题】An e-book, also known as an electronic book, is an electronic version of a print book that you can download and read. What you need in order to read an e-book is an E-book Reader, which is a kind of _...
【单选题】According to the passage, hotel guests can use electronic digital equipment __________. prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
A.
by booking in advance
B.
with the manager’s permission
C.
with the help of a staff member
D.
by paying an extra fee
【单选题】Deepika Pradeep is looking for a gift for her 15th birthday. She visited www.google.com for new electronic games and other gifts. According to the authors of your text, Deepika is using _____ as a sou...
A.
Advertising
B.
public sources
C.
experiential sources
D.
personal sources
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