引起小儿充血性心力衰竭最常见的原因是（）
A.先心病
B.心肌炎
C.肺炎
D.风湿性心脏病
E.心肌病
参考答案：A
First impressions are the most lasting. After all, you never get _______ second chance to make
_______ first impression.[ ]
A. a; the
B. the; the
C. a; a
D. the; a
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