【判断题】When laying out orthographic views, it is the usual practice to consider the frontal plane as lying in the plane of the paper and the horizontal and profile planes as being revolved into the frontal p...
【单选题】If a chiral molecule has an absolute configuration of R, which direction does it rotate the plane of polarized light? A. clockwise (dextrorotatory) B. counter clockwise (levorotatory) C. it ...