下列哪项符合心房颤动的临床表现（）
A.心率快，规整
B.心率慢，不规整
C.心率快，节律完全不整
D.心率慢，规整
E.心率慢，节律完全不整
参考答案：C
周长是36分米的正方形，它的边长是（ ）．
If I would have had more time, I would have done it far better.
A B C D
