自力式调节阀不需任何外加能源，它集测量、调节、执行三种功能于一体，利用被调对象本身的能量带动其工作。
参考答案：对
— Bob, could you help me _____ when the earliest train will leave for Shanghai?
— OK, I'll do it right away.[ ]
A. look out
B. get out
C. find out
D. take out
统筹区域发展
