非货币性金融资产的收益率与货币需求量()
A.负相关
B.正相关
C.不相关
D.不确定
参考答案:A
---I have finished my homework already, mum.
--- When ________ you ________ it?
A.did; finished
B.did; finish
C.have ; finished
D.were; finishing
化水PCA段框架开关控制电源电压为()。
A.380V交流电
B.220V直流电
C.110V直流电
D.220V交流电