心脏最大径是指
A．心影左侧最突点至中线距离与右心缘最突点至中线距离之和
B．右心缘上下部交界点至心尖部之间距离
C．心缘左侧最突点至中线距离
D．心影左右两侧最突点之间距离
E．心缘右侧最突点至中线距离
参考答案：A
解析： 心影最大径是指心影左侧最突点至中线距离与右心缘最突点至中线距离之和。胸廓最大横径是左右膈顶平面两侧胸廓肋骨内缘间连线的长度。
Dear friend, My name is Erick. I am 12.My birthday is on October 12th.I am from America. I'm in Class 3, Grade 7.We are learning Chinese in our school. Our Chinese teacher's name is Wang Hao. Here are some of my friends. Jimmy is tall and he has black hair. He is good at playing basketball. He is in the Basketball Club. May is short and she wears glasses and a yellow dress. She likes English very much and speaks English very well . Sally is a black girl. She has short hair. She likes swimming. She swims best in the swimming team. I like music. I'm the boy with glasses. Write to me soon and tell me about your friends. Yours， Erick
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