资金成本的基础是()
A.资金时间价值
B.社会平均资金利润率
C.银行利率
D.市场利率
参考答案:A
B细胞识别抗原决定簇的特点是()
A.特异性识别线性决定簇
B.特异性识别构象决定簇
C.特异性识别载体决定簇
D.特异性识别加工处理的抗原多肽
E.可识别线性决定簇和构象决定簇
Do you have any difficulty ____ these flowers? I'd like to help you if you need. [ ]
A. to plant
B. for planting
C. with planting
D. in planting