马心脏叩诊，先沿第几肋间向下叩诊（）
A.3
B.4
C.5
D.6
E.7
参考答案：A
循环水系统开车前应确认？
—Who is the most _______ student in your class?
—I think Jimmy is. He is very out going, helpful and creative. [ ]
A. popular
B. clever
C. friendly
D. patient
