A.It is sad that you can find comfort with friends only in Facebook.B.It is conve
A. It is sad that you can find comfort with friends only in Facebook.
B. It is convenient to chat with others across communities with Facebook.
C. It is terrible to reveal personal feelings in Facebook.
D. It is satisfying to find the social norm changing over time with Facebook.
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A.Personal information. B.Political scandals. C.Business affairs,
A. Personal information.
B. Political scandals.
C. Business affairs,
D. Religious events.
A.Major European airlines will go bankrupt,B.Europeans will pay much less for tra
A. Major European airlines will go bankrupt,
B. Europeans will pay much less for traveling.
C. Traveling time by train between major European cities will be cut by half.
D. Trains will become the safest and most efficient means of travel in Europe.
压气机所需要的功可从第一定律能量方程式导出，试导出定温、多变、绝热压缩压气机所需要的功并用T-s图上面积表
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