冠心病Ⅱ期康复的目标。
参考答案：
Ⅱ期康复的目标是保护和进一步改善出院时的心功能水平，逐步恢复生活完全自理过渡到恢复正常社会活动，提高生活质量。
—I have been waiting for you so long.
—Sorry, I have been in the library, _______ my friend look for some books.
A．helped
B．helping
C．to help
D．help
下列计算正确的是[ ]
A．x2+x2=x4
B．x2﹣x2=x0
C．x2×x2=x4
D．x2÷x2=x1
