8086的一个总线周期,最多可交换()字节。 A.一个 B.二个 C.四个 D.八个

题型:单项选择题

问题:

8086的一个总线周期,最多可交换()字节。

A.一个

B.二个

C.四个

D.八个

考点:计算机硬件技术基础考试计算机硬件技术基础考试题库
题型:单项选择题
已知x=0是函数f(x)=(x2+bx)ex的一个极值点.
(1)求f(x);
(2)若不等式f(x)>ax3在[,2]内有解,求实数a的取值范围;
(3)函数y=f(x)在x=an(an>0,n∈N*)处的切线与x轴的交点为(an-an+1,0).若a1=1,bn=
1
an
+2,问是否存在等差数列{cn},使得b1c1+b2c2+…+bncn=2n+1(2n-1)+n2+2n+2对n∈N*都成立?若存在求出{cn}的通项公式,若不存在,请说明理由.
题型:单项选择题

阅读理解。

     I received a call today asking if I would be willing to bring food to a family in need. The mother was

having a major operation and would be lying down for several weeks. Of course, I responded with an

immediate"Yes!". As I planned the meal in my head, I thought of how many times over the years I had

been asked to prepare food. I have done so countless times with a very open heart.

     But the truly amazing thing is that I have received double over the course of my life. When my mother

died, our house was filled with fresh dinners for weeks. A woman from the church of our community

stopped by each evening with some food. The gift of food was her small way of trying to ease our pain.

     Later in my life, when I was on bed rest during my pregnancy (怀孕) with twins, women of the

church again stepped in to help. They arranged babysitting for my two-year-old daughter, and brought

lovely dinners to our house. Even when I was put in the hospital, my husband would bring cooked meals

to my hospital room. How we relied on these dinners to feed my tired husband and young daughter!

     Food is all about comfort. It feeds our bodies, but it can also feed our souls. When you hear people

talking about their favorite holidays, it usually includes their feelings connected with sharing food. I know

that I will have many more opportunities in my lifetime to prepare food for others. It is truly a gift I look

forward to preparing and delivering to someone in need.

1. The author has received lots of food from others because.

A. she is poor at cooking

B. she is a church member

C. she is popular with others.

D. she has given others food

2. We can learn from the first paragraph that the author. 

A. had to stay in bed for several weeks

B. knew the family in need very well

C. was glad to be able to lend a hand

D. was tired of preparing food

3. Which of the following is TRUE about the author?

A. Her mother died when she was in hospital.

B. She didn't get enough food during her pregnancy.

C. She received food as well as comfort in her hard times.

D. She thinks offering food is the best way to show love.

4. What do we know about the author's family? 

A. Her family is too poor to buy enough food.

B. Her family lives not far away from a church.

C. Her husband is not good at cooking.

D. She has a babysitter taking care of her twins.

题型:单项选择题

简述典型的泄漏计算模型。

题型:单项选择题

房地产开发企业在确定土地增值税的扣除项目时,允许单独扣除的税金是( )。

A.营业税、印花税
B.房产税、城市维护建设税
C.营业税、城市维护建设税
D.印花税、城市维护建没税

题型:单项选择题

近期国际金融危机对于毕业生的就业影响非常大,某高校就业中心的陈老师希望广大同学能够调整自己的心态和预期。他在一次就业指导会上提出,有些同学对自己的职业定位还不都准确。

如果陈老师的陈述真,则以下哪项不一定为真()

Ⅰ.不是所有的人对自己的职业定位都准确。

Ⅱ.不是所有人对自己的职业定位都不够准确。

Ⅲ.有些人对自己的职业定位准确。

Ⅳ.所有人对自己的职业定位都不够准确。

A.仅Ⅱ和Ⅳ。

B.仅Ⅲ和Ⅳ。

C.仅Ⅱ和Ⅲ。

D.仅Ⅰ、Ⅱ和Ⅲ。

E.仅Ⅱ、Ⅲ和Ⅳ。

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