留置导管败血症感染途径，哪项错误（）
A.导管插入处的蜂窝组织炎
B.以上均包括
C.导管内细菌寄殖
D.感染性血栓性静脉炎
E.输液污染
参考答案：E
What does the passage mainly discuss a. Trends in teaching mathematics to children. b. The use of mathematics in child psychology. c. The development of mathematical ability in children. d. The fundamental concepts of mathematics that children must learn.
在华的外国企业、组织、外籍人、无国籍人等，都是我国税收法律关系的主体。( )
