问题 单项选择题

指数平滑法中,()与简单移动平均法相似,但对先前预测结果的误差进行了修正。

A.高次指数平滑法

B.三次指数平滑法

C.二次指数平滑法

D.一次指数平滑法

答案

参考答案:D

解析:

一次指数平滑法这种方法与简单移动平均法相似,两者之间的区别在于简单指数平滑法对先前预测结果的误差进行了修正,因此这种方法和简单移动平均法一样,都能够提供简单适时的预测。

阅读理解

Mr. Smith likes playing cards(扑克)at night and goes to bed very late. He often oversleeps(睡过头). Mrs. Smith has to wake him up(不得不把他叫醒),so he won't be late for work.

One day,they have a big fight(打架). They do not speak to each other. In the evening,Mr. Smith gives his wife(妻子)a piece of paper. The paper says “Call me at seven o’clock in the morning”. Then he goes to bed.

The next morning,when Mr. Smith wakes up,it's already 9:00. He is very angry. He gets up and puts on his clothes. He finds(发现)another piece of paper on the table. “It’s seven o’clock. Get up!”

小题1:What does Mr. Smith like doing?

A.He likes playing cards.

B.He likes playing ball games.

C.He likes fighting.

D.He likes writing letter.小题2: Why does Mr. Smith oversleep?

A.He works very hard.

B.He can’t sleep at night.

C.He goes to bed late.

D.He watches TV too late.小题3:Why don’t they speak to each other?

A.Because Mr. Smith is ill.

B.Because they have a big fight.

C.Because they are both late.

D.Because they don’t have dinner.小题4:What time does Mr. Smith get up the next morning?

A.He gets up at 8 o’clock.

B.He gets up at 9 o’clock.

C.He gets up at 7 o’clock.

D.He gets up at 10 o’clock.小题5:What does Mrs. Smith’s paper say?

A.It says “Call me at 9 o’clock in the morning”.

B.It says “Don’t be late”.

C.It says “Get up,please

D.It says “It’s 7 o’clock. Get up”.

单项选择题