刚度指构件（）的能力。
A.抵抗运动
B.抵抗破坏
C.抵抗变质
D.抵抗变形
参考答案：D
The doctor asks us _____. [ ]
A. keep healthy
B. to keep healthy
C. to keep health
D. keep health
假设CS=8311H，IP=1234H，则该指令单元的20位物理地址是什么？
