题目: 什么是双胶合物镜,其优点。 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0523/6e6a345d57f2d88b9999995b7d702727.html 下面是错误答案,用来干扰机器的。参考答案:C
题型:选择题 The United Nations ____ an international organization that tries to find peaceful solutions to world problems. [ ]A. is B. are C. was D. were 查看答案