A.对
B.错
[判断题]A.对B.错
[单选题]A.120°B.90°C.80°D.40°E.30°
[单选题]A.πB.C.D.
[单选题]A.2B.C.D.1
[单选题]A.单纯扩散B.载体介导的易化扩散C.通道介导的易化扩散D.主动转运