下列属于实质性大器官移植的是
A．胰岛移植
B．库存骨移植
C．肾移植
D．足趾移植
E．神经移植
参考答案：C
A two-year-old girl named Niu Niu, _______ falling from the IOth floor of a building, was caught by a "super-mother" Wu Juping with her bare arms.
A．having been noticed
B．noticing
C．being noticed
D．having noticed
DDN网络的用户节点机为DDN用户入网提供接口和必要的（）。
