题目

 After the earthquake，the villagers decided to build a monument ______ the rescue workers who lost their lives. A. in search of                B. in place of                C. in need of                 D. in memory of 答案：D已知下列式子：①6x-3=8；②6-2=4；③x+y；④；⑤3x-4y；⑥；⑦x=3；⑧x+2＞3，其中方程的个数是A.5B.6C.7D.8