调速器的作用是什么:
参考答案:
调速器的作用有:
(1)调整机组的转速。
(2)开机、停机和事故停机。
(3)机组并列运行时,自动地分配各机组之间的负荷。
The college entrance exam is ____ important to the student, and it’s also challenging.
A.no more than
B.no less than
C.more than
D.not more than
对溶栓后的再灌注状态检测时,至少需要采集的两点血样是()
A.治疗开始时和治疗开始后60min
B.治疗开始时和治疗开始后90min
C.治疗开始时和治疗开始后120min
D.治疗开始后30min和60min
E.治疗开始后30min和90min