一个平行四边形的广告牌，底12米，高15米．这个平行四边形的面积是多少？
12×15=180（平方米）．
答：这个平行四边形的面积是180平方米．
There was a __________ look on her face when you spoke to her about the question.[ ]
A. puzzling
B. puzzled
C. puzzle
D. puzzles
* * 片
A．崩解时限为5minB．崩解时限为10minC．崩解时限为15minD．崩解时限为30minE．崩解时限为60min
