药材丁香的分泌组织是() ["A.乳汁管","B.油管","C.油室","D.树脂道","E.黏液腔"]
链激酶的作用() ["抑制凝血酶","抑制ADP诱导的血小板聚集","具有溶栓作用","体内有效","体内、体外都有效"]
患者女,70岁,血压180/100mmHg,血压和血钾偏高,下列哪个药物不能选用() ["辛伐他汀","吉非贝齐","尼莫地平","颉沙坦","螺内酯"]
肝素的作用机制() ["直接灭活凝血因子","激活纤维蛋白溶解酶原","促进抗凝血酶Ⅲ的作用","拮抗钙离子","抑制肝合成凝血因子"]
在图示电路中,当开关S断开时,电压U=10V,当S闭合后,电流I=1A,则该有源二端线性网络的等效电压源的内阻值为:() ["16Ω","8Ω","4Ω","2Ω"]
故障工单和日常维修工单的区别?