问题 问答题 简答题

下部钻柱弯曲对井斜的影响?

答案

参考答案:

1)下部钻柱弯曲使钻头相对于井眼轴线偏斜,其钻进的方向偏离原井眼方向,直接导致井斜。

2)下部钻柱弯曲使钻压改变了作用方向,即不在沿井眼轴线施加给钻头,而是偏离了一个角度,从而使钻压产生一个引起井斜的横向偏斜力导致井斜。

阅读理解

阅读理解。

     Department stores sell ready-to-wear clothing, which is also called ready-made-clothing Such clothing

is made in fixed sizes. Those people who find that ready-made clothing fits them well can save money by

buying it. Most often. People do not fit exactly into a producer's size. Their clothing must be altered (改变)

to make it fit better, However, most alterations are not very expensive. The small cost of most allerations

means that ready-made clothing can meet the needs of most customer.

     Those who can afford it often get someone to design and make their clothing. Such clothing is called

custom-made(定做的). The person who makes it measures the customer, and then sews it so that it fits

perfectly. Alterations are not needed. Custom-made clothing is largely sewn by hand. Has better quality,

better material, and is of the style you have chosen. Of course, it costs much more than ready-to-wear

clothing. You need to pay the difference for the special fitting and better skill that you are receiving. This

often means that you spend double or more than you would for a ready-made garment (衣服).

     Custom-made clothing is not always that much better than ready-made clothing. It costs more partly

because only one garment has been made, just for you. Companies that produce ready-made products make

thousands of garments at a time. This means they can buy large quantities of material. Workers cut each

size by the hundreds. Companies work out ways to make the garments, quickly ly machine and pay workers

according to their skill. Thus they can sell the finished products at a low price while still making money.

Most of the clothing sold in the United States is made in this way. Customers gain from the lower prices

which are made possible by mass production (批量生产).It may or may not give them high quality.

1. According to the passage, people who buy ready-made clothing _____.

A. wish to make alterations

B. can fit into the sizes

C. want to make it better

D. will spend less money

2. We can learn from the passage that custom-made clothing is _____.

A. specially made

B. fashionably designed

C. chosen by few people

D. made with difficulties

3. Which of the following is true about ready-made clothing?

A. It is of poor quality.

B. It suits all people.

C. It takes more time to make it.

D. It is labor-saving to make it.

4. The purpose of the writer is _____.

A. to explain why custom-made clothing costs more

B. to show the advantages of mass production

C. to provide information about different kind-of clothing

D. to tell readers how to make money from ready-made clothing

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