反馈调节系统是闭环系统()
A、不一定
B、不是
C、是
参考答案:C
Since her father could not drive her to the airport, she requested her uncle to drive her instead.
A.take
B.bring
C.dispatch
D.deliver
急性间质性肾炎光镜下可见间质水肿伴炎症细胞浸润,其中不常见的炎症细胞为()
A.淋巴细胞
B.中性粒细胞
C.嗜酸性细胞
D.单核细胞
E.嗜碱性粒细胞