Printing ______ greatly at the beginning of the 11th century.A: will be developedB: has been developedC: is developedD: was developed

Printing ______ greatly at the beginning of the 11th century.

A: will be developed

B: has been developed

C: is developed

D: was developed


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Printing ______ greatly at the beginning of the 11th century.A: has been developedB: will be developedC: was developedD: is developed

PrintDocument类类属于System.Drawing.Printing名字空间。()

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