A.1000
B.1500
C.2000
D.2500
[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
[单选题]A.B.C.D.E.
[单选题]A.B.C.D.
[单选题]A.120°B.90°C.80°D.40°E.30°
[判断题]A.对B.错
[单选题]A.πB.C.D.
[单选题]A.2B.C.D.1