下列关于脐动脉血流多普勒的描述不正确的是

A．脐动脉多普勒超声测定S／D及RI可推断胎盘功能状况

B．S／D及RI均可随妊娠的进展其值逐渐减小

C．孕37周后，S／D＞3或RI＞0．6，则提示早期胎儿窘迫

D．S／D及RI均随妊娠的进展其值逐渐增加

E．多普勒检查取样容积放在近胎盘2～3cm处的脐带内为宜

下列程序通过设定线程优先级，抢占主线程的CPU，选择正确的语句填入横线处。 class T14 implements Runnable { private Boolean fStop - true; public void run() { while(fStop) { System.out.println(Thread.currentThread().getName() + "run"); try {Thread.sleep(l); } catch(Exception e) {e.printStackTrace()； } } } public void stopRun() { fStop = false; } } public class Testl4 {public static void main(String[] args){ T14 t14 = new T14(); Thread t1 = new Thread(ti4, "T14"); Thread t = Thread.currentThread()’; ______; Ti.start(); T14.stopRun(); System.out.println ( "stop ");} }

A．setPriority(Threa MIN_PRIORIT

B．t1 .setPriority(Threa MIN_PRIORIT

C．setPfiofity(Threa MIN_PRIORIT

D．t14.setPriority(Threa MIN_PRIORIT