【简答题】如图所示的电桥电路中已知电阻 R1 , R2 和 R3 中的电流分别为 25mA,15mA 和 10mA, 方向如图中所示,那么额电阻 R4 , R5 和 R6 中的电流分别为 mA 、 mA 、 mA 。
【简答题】如图所示电路中,已知 E=12V ,内阻不计,电阻 R1 , R2 两端的电压为 2V 和 6V ,极性如图,那么电阻 R3 , R4 , R5 两端的电压分别为 , 和 。
【单选题】30-year-old man had a 2-week episode of malaise, fever, and jaundice 7 years ago. On physical examination, there were needle tracks in the left antecubital fossa Sero- logic test results were positive...
A.
Serum alanine aminotransferase(ALT) level
B.
Serum alkaline phosphatase level
C.
Serum a-fetoprotein level
【单选题】He must be in the building because he was seen ______ the building just now.
【单选题】The man had a motive for the murder. ___________ ,he was seen in the area at the time
【多选题】有关科目汇总表账务处理程序说法正确的有( )。