【单选题】下列呼吸衰竭患者中,属于机械通气适应证的是()
C.
严重低氧血症或(和)CO潴留,达危及生命的程度(如PaO2≤45mmHg,PaCO≥70mmHg)
【多选题】对电气设备的验电要求有()。
A.
验电前,应先在有电设备上进行试验,确证验电器良好;
B.
必须用电压等级合适而且合格的验电器在检修设备进出线两侧各相分别验电;
C.
若在木杆、木梯或木架上验电,不接地线不能指示时,可在验电器上接地线,但必须经值班负责人许可;
【单选题】( ) 13.闭合性气胸,肺萎陷35%需要
【单选题】下列呼吸衰竭患者中,属于机械通气适应证的是
C.
严重低氧血症或(和)CO 2 潴留,达危及生命的程度(如PaO 2 2≤45mmHg,PaCO 2 ≥70mmHg)
【判断题】动物传播过程中,病原在载体中可复制,也可以不复制。()
【单选题】When is the Final Inspection usually carried out?
A.
Before the lathes are ready for packaging.
B.
After the lathes are transported to the customers.
C.
Before the lathes are installed for a testing.
D.
When the material and parts from the supplies arrive.
【单选题】When is the Final Inspection usually carried out?
A.
Before the lathes are ready fro packaging.
B.
After the lathe are transported to the customers.
C.
Before the lathes are installed are installed for a testing.
D.
When the material and the parts from the suppliers arrive.
【单选题】257银盐法测砷所使用的硫酸(6+94),制备方式正确的是()
A.
量取6.0ml硫酸加于94ml蒸馏水中,冷却后混匀
B.
量取6.0ml硫酸加于80ml蒸馏水中,冷却后加水稀释至94ml
C.
量取6.0ml硫酸加于80ml蒸馏水中,冷却后加水稀释,100ml
D.
量取94ml蒸馏水硫酸加于6.0ml中,冷却后混匀