问题
单项选择题
主动脉弓凸侧自右向左发出的第一个分支是 ( )
A．右锁骨下动脉
B．右颈总动脉
C．头臂干
D．左颈总动脉
答案
参考答案：C
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主动脉弓凸侧自右向左发出的第一个分支是 ( )
A．右锁骨下动脉
B．右颈总动脉
C．头臂干
D．左颈总动脉
参考答案：C
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| Hi, I'm David Xiang. I'm an English teacher, and also a basketball fan. But I used to be a movie fan when I was a student. My interests are changing all the time with my age. I used to like reading story books. I wasn't interested in music at all and seldom talked with my workmates when I began to work. But now my hobbies are listening to music, chatting on the Internet, and often telling jokes in the office. I used to know little about sports. But now I like watching all kinds of sports games with my wife, so I know a lot of news and knowledge about sports. I never miss any NBA basketball match. Do you share my interests? Let's be friends and tell me something about your hobbies. My e-mail address is david 9568 @msn.com. | |||||||||||
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