间接标价法
参考答案：
用一定单位的本国货币来计算应收若干单位的外国货币的汇率标价方法。
用所给词的适当形式填空。
1. Please give it to ____________ (I).
2. He has ____________ (lot) of friends.
3. John ____________ (do) his homework every night.
4. Why are you ____________ (laugh)?
5. It's easy ____________ (make) mistakes with English.
遗传转化受体系统
