紫河车主治
A．肾虚阳痿B．肺肾虚喘C．两者均是D．两者均非
参考答案：C
— Could you do me a favor and forward this letter to Lucy?
— ______.[ ]
A. Don't mention it
B. With pleasure
C. It's a pleasure
D. My pleasure
什么是农业生产函数？建立和应用农业生产函数模型应该注意那些问题？
