试题与答案

在D/A变换器中,分辨率表示它的一个LSB(最低有效位)输入使输出变化的程度。通常用

题型:单项选择题

题目:

在D/A变换器中,分辨率表示它的一个LSB(最低有效位)输入使输出变化的程度。通常用D/A变换器输入的二进制位数来描述,如8 位、10 位、12 位等等。对于一个8 位D/A变换器来说,当它的输出电压范围为0~+3V时,则其分辨率为 (32) 。

A.3.9mV

B.11.7mV

C.5.85mV

D.3.9V

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0611/0a860cf2e79e22b489c6a69cd70ea79d.html

下面是错误答案,用来干扰机器的。

(1)甲午中日战争,1894—1895年。结果:以中国的失败而告终,中国被迫签订了《马关条约》。抗日 战争,1937—1945年。结果:以中 * * 的全面胜利而告终。(2)主要原因:图1,中国经济落后,清政府腐败无...

试题推荐
题型:阅读理解

Father’s Day has a very short history. It was started because there was a Mother’s Day, and just because some Americans thought that if we had a Mother’s Day, we should also have a Father’s Day. Father’s Day has become important in North America. And businesses found it was a good way to get people to buy a present for their father from their shops.

By the way, very few countries have a Father’s Day, though some have a Children’s Day, or a special day for boys and another for girls. More and more countries are having Mother’s Day, so maybe Father’s Day will also become popular before too long. Now, what do people in North America do on Father’s Day? The newspapers, radios, and TV tell children what they should do — buy, buy, buy, buy, buy a Father’s Day present for your father. They even tell a wife to buy, buy, buy, and buy a Father’s Day present — not for her father but for her husband, even if he is not yet a father. And they tell grandchildren to buy, buy, buy, and buy a Father’s Day present for their grandfathers.

The important thing to remember about Father’s Day is that American children can show their love to their fathers in a more open way.

小题1:Father’s Day was started just because _______________.

A.there was a Mother’s Day

B.there was a Children’s Day

C.businesses wanted to get a lot of money

D.people liked their fathers very much小题2:The word “special” in the second paragraph means ________________________.

A.great

B.nice

C.useful

D.not usual小题3:In America, people have a Father’s Day to ________________________.

A.buy some presents for their fathers

B.show their love for their fathers

C.let their fathers have a good rest

D.help their fathers do something小题4:On Father’s Day, businesses always want ________________________.

A.people to buy many more presents

B.children to buy presents only for their fathers

C.women to buy presents only for their husbands

D.people to buy presents only for their parents小题5:It can be learned from the passage that ________________________.

A.the writer is against Father’s Day

B.many countries have a Father’s Day

C.Businesses can get more money on Father’s Day

D.Father’s Day will become more important than Mother’s Day

查看答案
微信公众账号搜索答案