招标投标活动必须遵守（）的原则。 A.诚实信用 B.公开 C.公正 D.科学 E.公

有以下程序#include void WriteStr(char *fn,char *str){ FILE *fp;fp=fopen(fn,"w");fputs(str,fp);fclose(fp);}main(){WriteStr("t1.dat","start"); WriteStr("t1.dat","end");}程序运行后,文件 t1.dat 中的内容是______。

A．start

B．end

C．startend

D．endrt

主板有许多分类方法，按它本身的规格可分为______。

A．AT主板、Baby-AT主板、ATX主板

B．Slot 1主板、Socket7主板

C．SCSI主板、EDO主板、AGP主板

D．TX主板、LX主板、BX主板

阅读理解。

     Born in London in 1815, Ada Lovelace was the daughter of Annabella Millbanke and the British poet Lord

Byron. Her parents separated just a month after she was born. Less than a year later, Lord Byron went abroad

and never returned ( he died in Greece in 1824). Ada never knew her father and was raised by her mother. Her mother had mathematical training and insisted that Ada, who was educated privately, study mathematics too.

Ada did well not only in mathematics and science, but also in music and PE.

     In 1833, Ada met Charles Babbage, a famous English mathematician. He was known as the inventor of a

calculating machine called the Difference Engine. They became good friends and began to write to each other

 on the topics of mathematics, logic, and many other subjects.

     Babbage had made plans in 1834 for a new kind of calculating machine ( although the Difference Engine

was not finished),an Analytical Engine. Few people in England would support him with his first machine

unfinished. But he found support for his new calculating machine abroad. In 1842, an Italian mathematician,

Louis Menabrea, published a paper in French on the subject of the Analytical Engine. Babbage asked Ada to

translate the paper.

     When she showed Babbage her translation he suggested that she add her own notes, which turned out to be

three times as long as Menabrea' s. The notes are the source of her enduring fame (不朽的声誉 ). In her notes, Ada predicted (预言 )that such a machine might be used to write music, to draw pictures, and would be used

for both practical and scientific use. She was correct.

     After she wrote the description of Babbage' s Analytical Engine,her life was plagued (折磨) with illnesses.

In 1852, she died of cancer and was buried beside her father at Newstead Abbey in Nottinghamshire, England.

     In 1980, 165 years after Ada' s birth, the US Defense Department announced a powerful new computer

language. They named it Ada in honor of Ada Lovelace' s important role in the history of computing.

1. It seemed that Ada' s mother _____.

A. had little money to educate Ada at home

B. wanted Ada to be a great musician

C. didn't wish Ada to be a poet like her father

D. didn't think Ada was a clever girl

2. Babbage didn' t find support for his Analytical Engine in Britain because _____.

A. his first calculating machine was not finished

B. no one thought the machine would be useful

C. he had moved to Italy and settled there

D. most of his inventions proved useless

3. Menabrea' s paper on Babbage' s Analytical Engine was written in _____.

A. English

B. Italian

C. German

D. French

4. What do we learn about Ada from the passage?

A. She was remembered as a great translator.

B. Her predictions have come true.

C. Her notes were written in computer language.

D. She led a long and fruitful life.

1.船舶装有雷达，并可使用；应正确使用，包括：（）

Ⅰ、远距离扫描并对测到的物标进行标绘

Ⅱ、远距离扫描并进行相当的系统观察

Ⅲ、利用两次回波方位距离进行标绘

A.Ⅰ

B.Ⅰ、Ⅱ

C.Ⅰ、Ⅱ、Ⅲ

D.Ⅰ、Ⅲ

地球的卫星，木星的卫星，以及土星的卫星，全都是行星系统的例证，其中卫星在一个比它大得多的星体引力场中运行。由此可见，在每一个这样的系统中，卫星都以一种椭圆轨道运行。　　以上陈述可以逻辑地推出下面哪一项陈述？

A．所有的天体都以椭圆转道运行。

B．非椭圆轨道违背了天体力学的规律。

C．天王星这颗行星的卫星以椭圆转道运行。

D．一个星体越大，它施加给另一个星体的引力就越大。