患者，男性，40岁，因急性上腹部剧烈疼痛伴呕吐入院，查体：血压110/60mmHg，脉搏86次/分，肠鸣音减弱，腹部有反跳痛。实验室检查：血清外观浑浊，TC8.9mmol/L，TG17.2mmol/L，血液AMY550U/L，该患者最有可能的诊断是（）

A.胆结石

B.急性胰腺炎继发高三酰甘油血症

C.肠梗阻

D.胃溃疡

E.心肌梗死

We know a computer is a machine that processes data (stored in main memory) into information, under control of a stored program. We also know that, internally, a computer is a binary machine; thus the data and the program instruictions must be stored in binary form. Characters are represented in (71) . Numbers are stored as binary numbers, with each bit’s positional value significant. A computer’s main memory is divided into bytes, words or both (depending on the system), and each of these basic storage units is assigned an (72) . Using this address, the processor can read or write selected bytes or words.

The processor consists of a clock, an instruction control unit, an arithmetic and logic unit, and registers. Once a program is stored in main memory, the processor can begin to execute it. During (73) , the instruction control unit fetches an instruction from main memory; during (74) , the arithmetic and logic unit executes it. Precisely timed electronic pulses generated by the clock drive this basic (75)

（74）处填（）。

A．E-time

B．I-time

C．cycle time

D．run time