Every student in our class had an application form in his hand，but no one knew which office ________.

A．to send it to

B．to send it

C．to be sent to

D．to have it sent

超急性排斥反应的血管病理特点是

A．急性小动脉炎、血栓形成

B．血管内膜纤维化

C．血管壁洋葱皮样改变

D．血管壁玻璃样变