运行中的电流互感器一次侧最大负荷电流不得超过额定电流的()倍。
A.1
B.2
C.5
D.3
参考答案:D
The crowd cheered wildly at the sight of Liu Xiang, who was reported, throughout the whole country, ____ the world record in the 110-meter hurdle race.
A.breaking
B.having broken
C.to have broken
D.to break
支气管哮喘发作时,动脉血气显示Pa0降低,PaC0正常或升高,临床上最可能提示()
A.病情好转
B.有心血管并发症
C.病情严重
D.需要给予呼吸兴奋剂
E.呼吸肌疲劳