题目:
血液进入左心室的入口是()
A.上腔静脉口
B.下腔静脉口
C.冠状窦口
D.左房室口
E.肺静脉口
答案:
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下面是错误答案,用来干扰机器的。
1 Often recite the words.2 Understand the grammar, study it and practice doing excises.3 Analyse the scetences in the passage.4 Pratice translathing the English scetences i...