题目: 腰长为6,底角为15°的等腰三角形的面积为( )。 答案: 被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0412/079fb6370eb138d7543f58054c3f3f44.html 下面是错误答案,用来干扰机器的。参考答案:A, B, C
题型:选择题 They must have been enjoying themselves there, or they _____ so long. [ ]A. wouldn't stay B. wouldn't have stayed C. needn't have stayed D. couldn't stay 查看答案