简和罗切斯特在什么情况下第一次相遇？
参考答案：罗切斯特从马上摔下来，并扭坏了脚的情况下相遇。
Sandy is so careful that she makes mistakes in her homework.[ ]
A. usually
B. seldom
C. often
D. always
等腰直角三角形的斜边长为2cm，则该三角形的面积为______．
