Selecting a mobile phone for personal use is not an easy task because technology ________ so rapidly.

A．is changing

B．has changed

C．will have changed

D．will change

首创"治癫疾者常与之居"的著作是（）

A.《金匮要略》

B.《难经》

C.《内经》

D.《丹溪心法》

E.《证治准绳》