【单选题】在做功效分析时,以下那个量是最难规定的( )
【单选题】地西泮经肝脏代谢后,代谢物仍有活性, 由此研究得到的药物是 ( )
【单选题】The specific function of a membrane within a cell is determined by the
A.
degree of saturation of the fatty acids within the phospholipid bilayer
B.
location of the membrane within the cell.
C.
presence of lipid rafts and cholesterol.
D.
type and number of membrane proteins
【判断题】13省铜剂为糊状,可用醋和面粉来替代,主要原理是氧化掉铜表面的铜锈而达到使铜制品光亮的目的,适用于镀铜制品和纯铜制品。()
【单选题】What is wrong about the description of cell membrane structure and function ( )
A.
Cell membrane is a semi-permeable membrane with special structure and function
B.
Cell membranes are the gateway for cells to be affected by other factors
C.
The structure of the cell membrane is based on a lipid bilayer and is embedded with proteins with different physiological functions.
D.
Water-soluble substances generally pass freely through the cell membrane, while fat-soluble substances cannot