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【单选题】
要使用StringBuilder类,需要引用的命名空间是A.
System.Text
B.
System.Data
C.
System.IO
D.
System.Data.SqlClient
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【简答题】New York, London, Paris and other big cities are exciting places to live in. There are many interesting things to see and to do. You can go to different kinds of museums, parks and cinemas. You can al...
【单选题】In fact, most people in some developed countries are ___ than they were two years ago because of the global financial crisis.
A.
poorer off
B.
badly off
C.
worse off
D.
richer off
【简答题】A．People in some developing countries have realized that the world's resources are limited. B．People in developed countries do not care much about common properly. C．Laws have to be passed to protect ...
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