在核心业务系统中核算的暂收暂付款项包括（）.A.出纳长短款 B.行政出纳长短款 C.

两个已知阻值的电阻R₁和R₂并联，已知通过R₁的电流是I₁，则干路电流I等于 ______．

阅读理解。

     Parents always ask, "How can I get my child to eat fruits and vegetables?" One answer is to teach

your children to fill their bodies with colour.  Fruits and vegetables come in so many beautiful colours.  

Every different colour is good for us.

     Orange and yellow fruits and vegetables such as sweet potatoes and oranges are healthy. They have

many kinds of vitamins (维生素), such as Vitamins A, B and C.Dark green foods like spinach (菠菜)

are very healthy.Red foods like tomatoes and strawberries have Vitamin C.Blue or purple fruits and

vegetables such as blueberries and red cabbage are also good for you.

     What about the colour white? White is not a colour of the rainbow (彩虹) ! White bread is not very

healthy,  but whole wheat bread is good for you.  Too much sugar and salt are not good for you.  Of

course, some white foods, like milk and tofu are very good for you. Finally, remember the most important

thing. Parents need to be good examples. You need to eat a rainbow, too!

1. From the passage we know that _______ are red foods.

A. milk and tofu                    

B. spinach and red cabbage

C. tomatoes and strawberries          

D. sweet potatoes and oranges

2. Which of the following foods has no Vitamin C in it?

A. Tofu.                    

B. Tomatoes.

C. Strawberries.              

D. Oranges.

3. In the last sentence, "eat a rainbow" means "_______"

A. eat different colours

B. eat the seven colours

C. eat foods of different colours

D. eat the rainbow in the sky

4. The main idea of the passage is _______.

A. colour foods have many vitamins

B. dark green foods are very healthy

C. eating much sugar and salt is not good for you

D. eating fruits and vegetables of different colours is good for you

在果实贮藏中应设法控制和消除（），以削弱果实成熟作用。

A、氧气

B、CO₂

C、氢气

D、乙烯

电流做功的过程，实际上是将______能转化为其它能的过程，测量电功的仪表是______．

全部成本按性态进行分解后，可分为（）组成部分。

A.固定成本和变动成本

B.固定成本、变动成本和半变动成本

C.酌量性固定成本和约束性固定成本