题干
.
–What have been doing _______? I’ve been so little of you.
--I have to leave early for work and comes home very ________.
–What have been doing _______? I’ve been so little of you.
--I have to leave early for work and comes home very ________.
A：late; lately
B：late; late
C：lately; late
D：lately; lately
答案(点此获取答案解析）
C
，
，若以
、
为边作三角形，则
的取值范围（ ）
