易化扩散
参考答案：易化扩散：水溶性或脂溶性较小物质在膜蛋白参与下（1分），由高浓度膜一侧扩散到低浓度一侧的过程。（1分）
— Could you tell us ______ ? —About two weeks.
A．how often are you going to be away
B．how often we are going to be away
C．how long are we going to be away
D．how long we are going to be away
简述无为思维。
