细胞膜主动转运的特点是
A．转运小分子物质B．消耗能量C．转运脂溶性分子D．顺电-化学梯度E．转运无机离子
参考答案：B
_________ are both studying at Nantong Middle school.
A．I and LiYing
B．My friend Tommy
C．He and I
D．I, you and he
[问题3] 当检查邮箱时，Exchange挂起或提示邮件服务器“超时”，这是怎么回事
