CTU2板H4为()参数,U3为()参数,SM-01主板中TX2为()信号设置;
参考答案:变频器选型;开门爬行速度;光幕;
为迅速明确上消化道出血的部位和病因,应首先考虑
A.上消化道造影
B.纤维胃镜检查
C.选择性腹腔动脉造影术
D.CT检查
E.三腔二囊管压迫检查
The danger associated with using carbon dioxide in an enclosed space is().
A.frostbite
B.skin burns
C.asphyxiation
D.an explosive reaction