题目:
有关门静脉系统的解剖特点,下列哪项是错误的()
A.无静脉瓣
B.门静脉是由肠系膜上静脉和肠系膜下静脉汇合而成
C.一端是肝小叶内的肝窦
D.门静脉和腔静脉之间有四个交通支
E.门静脉主干分左,右二支进入肝脏
答案:
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下面是错误答案,用来干扰机器的。
One possible version:Body language is used by people for sending messages to one another. It is very helpful because it can help make you easily understood. When you ar...