An instruction is made up of (41) that specify the function to be performed and operands that represent the data to be operated on. For example, if an instruction is to perform the operation of (42) two numbers, it must know (43) the two numbers are. The processor’s job is to (44) instructions and operands from memory and to perform each operation. Having done that, it signals (45) to send it next instruction.

A．added

B．adding

C．add

D．addition

患者，男，45岁。上腹隐痛，便潜血阳性，钡餐见胃窦小弯侧黏膜纹理紊乱，胃壁僵硬。首先考虑（）

A.慢性胃炎

B.胃溃疡

C.胃癌

D.胃淋巴肉瘤

E.萎缩性胃炎