在控制管缆中，采用程序液压控制系统的最大优点.只需三根液压管线，即一根为导向控制线，一根为导向控制线，一根为供压控制线，一根为调节控制线。
参考答案：错
用所给单词的适当形式填空。
1. It is __________ (possible) for me to finish the work today. I need another day to do it.
2. This is our new classroom __________ (build). There are eighteen classrooms in it.
3. The famous __________ (science) Qian Suesen died of illness on October 31, 2009.
4. I __________ (think) he could come to my party, but now I know I was wrong.
5. No one taught me. I learnt it all by __________ (my).
关于心肌桥的描述，不正确的是（）。
A.是指冠状动脉的一部分行走于心外膜心肌下方
B.心室收缩时引起冠状动脉狭窄或闭塞，舒张时冠状动脉管径正常或接近正常
C.常见于左前降支
D.不会引起心肌梗死
E.可通过多排螺旋CT、冠状动脉造影、血管内超声来诊断
