题干
-Do you mind my opening the window?
-_ . It's so hot in the room.
A：Certainly
B：Of course not
C：Better not
答案(点此获取答案解析）
B
-Do you mind my opening the window?
-_ . It's so hot in the room.
A：Certainly
B：Of course not
C：Better not
”的图案，如图2所示，再将剪下的两个小矩形拼成一个新的矩形，如图3所示，则新矩形的周长可表示为（ ） 