The procedures(程序) of operating a computer have been ______ several times, the results

of which have made it much easier _______.   [ ]

A. cut down; to operate              

B. simplified; to be operated  

C. reduced; to be operated            

D. simplified; to operate

下列哪种药物可阻滞甲状腺球蛋白分解从而抑制甲状腺素的释放（）

A.丙基硫氧嘧啶

B.普萘洛尔

C.他巴唑

D.利血平

E.碘剂