脊髓突然横断后，断面以下的脊髓所支配的骨骼肌紧张性（）
A.暂时性增强
B.不变
C.暂时性减弱甚至消失
D.永久性消失
E.永久增强
参考答案：C
Read and choose. 补全对话，将选项前面的字母编号写在相应的横线上。
A. Do you have a headache
B. my throat is very sore
C. What's the matter
D. Thank you
E. Open your mouth
Doctor: 1____, Mike?
B: I feel sick.
Doctor: 2 _?
B: Yes, I have a headache.
Doctor: Do you have a sore throat?
B: Yes, 3 _.
Doctor: Let me have a look. 4 _ and say "Ah. . . ". You have got a cold.
Take some medicine and drink hot drinks.
B: 5 .
静脉导管留置时间过长易发生感染，一般导管留置时间不宜超过（）
A.1天
B.3天
C.2天
D.7天
E.14天
