题干
Jason got very angry and went out of the room without word．
A：a
B：an
C：the
D：不填
答案(点此获取答案解析）
A
Jason got very angry and went out of the room without word．
A：a
B：an
C：the
D：不填
Ti+2MgCl2，下列说法正确的是（ ）