【简答题】什么是功率因数?提高功率因数的意义是什么?有哪些措施?
【简答题】什么是功率因数?提高功率因数的意义是什么?有哪些措施?
【判断题】蒙牛和伊利借三鹿奶粉事件曝光在公关策略上的调整,这种公关策划可以叫做“借尸还魂术”。
【单选题】患者男,50岁。因CO中毒1天后入院,患者处于浅昏迷状态、脉搏130次/分、皮肤多汗、面色潮红、口唇呈樱桃红色。护士给患者吸氧,氧流量应为
【单选题】The girl who is kept _________ the nurse has _______ ill since last week.
A.
in the charge of fallen C. in the charge of been
B.
in charge of been D. taken charge of fallen
【单选题】It is believed that efforts at resuscitation are useless when ______.
A.
artificial respiration and massage of the heart have yielded no obvious result
B.
a person's heartbeat and breath have totally stopped
C.
standard methods of resuscitation have failed
D.
the brain is certainly dead