题干
I'm not feeling well. I may have ____ bad cold.
A：a
B：/
C：an
D：the
答案(点此获取答案解析）
A
I'm not feeling well. I may have ____ bad cold.
A：a
B：/
C：an
D：the
是虚数单位，则乘积
的值是 （ ）
