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问题 单项选择题

某计算机主存按字节编址，主存与高速缓存Cache的地址变换采用组相联映像方式（即组内全相联，组间直接映像）。高速缓存分为2组，每组包含4块，块的大小为512B，主存容量为1MB。构成高速缓存的地址变换表相联存储器容量为（）bit。每次参与比较的存储单元为（）个。

构成高速缓存的地址变换表相联存储器容量为（）bit。

A．4×10bit

B．8×10bit

C．4×11bit

D．8×11bit

答案

参考答案：B

单项选择题

妊娠期高血压疾病最常见的产科并发症是()

A．视网膜剥脱

B．急性肾功能衰竭

C．心脏病

D．胎盘早期剥离

E．HELLP综合征
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单项选择题

For many people today, reading is no longer relaxation. To keep up their work they must read letters, reports, trade publications, interoffice communications, not to mention newspapers and magazines: a never ending flood of words. In (1) a job or advancing in one, the ability to read and comprehend (2) can mean the difference between success and failure. Yet the unfortunate fact is that most of us are (3) readers. Most of us develop poor reading (4) at an early age, and never get over them. The main deficiency (5) in the actual stuff of language itself—words. Taken individually, words have (6) meaning until they are strung together into phrases, sentences and paragraphs. (7) , however, the untrained reader does not read groups of words. He laboriously reads one word at a time, often regressing to (8) words or passages. Regression, the tendency to look back over (9) you have just read, is a common bad habit in reading. Another habit which (10) down the speed of reading is vocalization—sounding each word either orally or mentally as (11) reads.
To overcome these bad habits, some reading clinics use a device called an (12) , which moves a bar(or curtain) down the page at a predetermined speed. The bar is set at a slightly faster rate (13) the reader finds comfortable, in order to "stretch" him. The accelerator forces the reader to read fast, (14) word by word reading, regression and subvocalization practically impossible. At first (15) is sacrificed for speed. But when you learn to read ideas and concepts, you will not only read faster, (16) your comprehension will improve. Many people have found (17) reading skill drastically improved after some training. (18) Charlie Au, a business manager, for instance. His reading rate was a reasonably good 172words a minute (19) the training; now it is an excellent 1,378 words a minute. He is delighted that how he can (20) a lot more reading material in a short period of time.

A．applying
B．doing
C．offering
D．getting
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