世界贸易组织的现行调整范围，包括（）。
A.国际货物贸易
B.国际投资
C.知识产权的国际许可
参考答案：A, C
While he was investigating ways to improve the telescope Newton made _______discovery which completely changed ____ man’s understanding of color.
a ,/ B. a ,the C. /, the D. the ,a
分解因式：(2a＋b)(2a－3b)－3a(2a＋b)；
