知识产权主要包括()和()两部分。
A.专利权;著作权
B.工业产权;著作权
C.商标权;专利权
参考答案:B
解下列方程:
(1)x﹣2=x(x﹣2);
(2)2x2+5x+2=0;
(3)(x+8)(x+1)=﹣12。
用恰当的介词填空。
1. There is a big library ______ the left.
2. Please sit ______ me. I want to talk with you.
3. Welcome ______ our shop again.
4. Look! Jack is standing ______ Tom and Jim.
5. The Science Museum is ______ front of the post office.