问题 问答题

某企业计划年度生产甲产品耗用A零件。甲产品全年产量为18 000件,单位产品耗用A零件0.5件。该零件可以自制,亦可以外购。如果外购,单价为5元,每次订货成本12元;如果自制,单位零件的材料费用1.8万元,人工费用1.2元,制造费用1元,每次生产准备成本500元。储存变动成本为零件价值20%。试问:选用自制还是外购。

答案

参考答案:

解析:(1)零件全年需求量:18 000 ×0.5=9 000(件)
每日平均需求量:9000÷360=25(件)
每日产量:18 000÷360=50(件)
外购储存变动成本:5×20%=1(元)
自制储存变动成本:4×20%=0.8(元)
自制单位成本:1.8+1.2+1=4(元)
如果采取外购,则:Q*
TCQ*


TC=9 000 × 5+465=45 465
若采取自制:
Q*


TC(Q*)
TC=9 000×4+1 897=37 897(元)
由于自制总成本37 897元低于外购总成本45 465元,故应以自制为宜。

阅读理解

As is known, healthy foods can help save your life. Now, here is a list of healthy foods that can save your memory. It is best that every person knows what he eats, as he takes in, can make or break himself, in terms of health.

Fish is helpful in regaining back the kind of memory that a person once has. Eating fish can help you save the trouble of forgetfulness. Vegetables rich in fiber and other dark and green leafy kinds are very suitable for people who want to avoid mental blocks. These foods contain high units of vitamin E.

Another food that is considered having different effects on preventing this brain deficiency (缺陷) is avocado (鳄梨), which is also rich in vitamins E and C. It is really good to know these healthy foods that can save your memory are always at hand so as to help you in your fight against diseases. Sunflower seeds are regarded as Vitamin C-powered seeds and also give you enough energy.

As for red wine, do not over consume it, as it is said to have to be taken in moderate amounts in order to help the body. Over-drinking can cause illness and like anything else. This is considered as one of the healthy foods that can save your memory; alcohol can otherwise lose it.

It is better to consume colored bread, rice and whole grains for you to get the best out of fiber. These foods can lower the body’s risk of being infected with Alzheimer’s disease(老年痴呆病).

Knowing the healthy foods that can save your memory is living the life that you have longed and desired. Among the others, the best, of course, is exercise. Taking in different kind of exercises, physical activities or sports can keep both your body and mind healthy.

小题1: If you suffer from loss of memory, you _______.

A.should eat cucumbers and cabbages

B.can drink as much wine as possible

C.had better take in fish in your meals

D.may as well take more Vitamin C小题2: To prevent mental disease from happening, _______.

A.people are advised to take avocados

B.it is best to eat vegetables high in fiber

C.it is better to have more sunflower seeds

D.red wine is the first and best choice小题3: Which of the following is the most important for health?

A.Drinking a proper amount of red wine every day.

B.Eating bread made of whole grains.

C.Adding Vitamin C-powered seeds to meals.

D.Taking moderate exercise every day.小题4: How many means for health does the author mention in the passage?

A.Six

B.Seven

C.Eight

D.Nine小题5: Which of the following is most suitable for the passage?

(①="Para.1  " ②="Para.2  " ③="Para.3  " ④="Para.4  " ⑤="Para.5  " ⑥=Para.6)

①                          ①

↙ ↘                     ↙ ↘     

A.②③④⑤

B.②③④⑤

↖↗↖↗

⑥⑥

①①

↙↘↙↘

C.②③④⑤

D.②③↖ ↗                             ↙↘

⑥                               ④ ⑤

↖↗

单项选择题