虎克弹性体的力学特点是（）
A、小形变、不可回复
B、小形变、可回复
C、大形变、不可回复
D、大形变、可回复
参考答案：B
Like some of my classmates,I cannot live up to my teachers'expectations; ________I let them down. [ ]
A. in other words
B. after all
C. what's more
D. more or less
杭州医疗保险医疗困难救助对象包括哪些？
