第一单元 细胞的基本功能
A．单纯扩散
B．易化扩散
C．主动转运
D．出胞
E．入胞
参考答案：A
The doctor _____ the crying baby, but he couldn't find out what was wrong with it. [ ]
A. looked over
B. looked after
C. looked for
D. looked out
把商务客户分为收汇型商户和兑付型商户是按（）来划分的
A、业务功能
B、业务办理范围
C、资金归集方式
D、付费方式
