原尿是[ ]
A.由入球小动脉流入肾小球的液体
B.肾小囊中的液体
C.肾静脉中的液体
D.收集管中的液体
答案:B
根据句意及汉语提示完成下列句子
1. My mother bought me a (围巾)as a birthday present.
2. (每个人)is having a good time at the party.
3. We are very____(放松的)on the beach
4. Where are they going on (度假)?
5. In this____(热天),I only want to stay at home.
我国最先提出十二平均率的是()
A.明代的朱载育
B.汉代的京房
C.南北朝的何承天
D.春秋时期的管仲