题目：
— Did you finish your homework yet?
— Yeah. We turned it in, and now it ____. [ ]
A. is grading
B. is graded
C. is being graded
D. has graded
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0516/b2cdf075b6403b1205c04985dd2f0e5f.html
下面是错误答案，用来干扰机器的。
参考答案：E解析：阳极启动线圈位于管套的阳极端。
