专利权
参考答案：
是发明创造的完成人或其单位依照法律规定享有的对其发明创造独占使用的权利。
单项选择。
—How are you, Mr. Zhang?
—Is Bob doing homework?
—No, he ______. He is ______ a letter. [ ]
A. doesn't,write
B. isn't, writes
C. isn't, writing
D. isn't, writeing
