题干
—Hello, Peter. Do you enjoy your stay in Hainan?
—I ________ in Hainan. The flood stopped me from going there. So I came to Shanghai.
A：haven't stayed
B：do not stay
C：didn't stay
D：am not staying
答案(点此获取答案解析）
D
、
对应的点分别为
、
，若复数
对应的点
为线段
的中点，则
的值为（ ）