请输入或粘贴题目内容
搜题
拍照、语音搜题，请扫码下载APP
题目内容
（请给出正确答案）
A．To produce them more cheaply.
B．To keep them a uniform. size.
C．To make them lighter.
D．To make them perfectly round.
答案
更多“A．To produce them more cheaply.B．To keep them a uniform. size.C．To make them lighter.D”相关的问题
第1题
According to the man, why did the astronauts made the beads in space？
A．To produce them more cheaply.
B．To keep them a uniform. size.
C．To make them lighter.
D．To make them perfectly round.
第2题
The purposes for several users to share a mainframe are ______.
A．to divide the cost of the equipment among them
B．to utilize the equipment to the maximum extent
C．to produce fewer PCs
D．both A and B
第3题
听力原文： No major changes in writing materials were to come for about 3,000 years. The person credited with inventing paper is a Chinese man named Ts'ai Lun. He took the inner bark of a mulberry tree and bamboo fibers, mixed them with water, and pounded them with a wooden tool. He then poured this mixture onto a flat piece of coarsely woven cloth and let the water drain through, leaving only the fibers on the cloth. Once dry, Ts'ai Lun discovered that he had created a quality writing surface that was relatively easy to make and lightweight. This knowledge of papermaking was used in China before word was passed along to Korea, Samarkand, Baghdad, and Damascus.
By the 10th century, Arabians were substituting linen fibers for wood and bamboo, creating a finer sheet of paper. Although paper was of fairly high quality now, the only way to produce written work was by hand, a painstaking process.
By the 12th century, papermaking reached Europe. In 1448, Johannes Gutenberg, a German, was credited with inventing the printing press.(It is believed that moveable type was actually invented hundreds of years earlier in Asia.) Books and other important documents could now be reproduced quickly. This method of printing in large quantities led to a rapid increase in the demand for paper.
(30)
A．To obtain its fibers.
B．To drain the water.
C．To make paper white.
D．To measure the size of paper.
第4题
A．To whiten our teeth immediately.
B．To be a member of a football team.
C．To become a movie star.
D．To be popular and have friends.
第5题
All living things need air ______.
A．to grow
B．to produce fruits
C．to breathe
第6题
What are these people planning to do？
A．To see a movie.
B．To make some coffee.
C．To borrow money.
D．To prepare a dinner party.
第7题
A．To get a good job.
B．To earn more money.
C．To show her ability to others.
D．To learn more about the history and culture of her country.
第8题
Vet's plans for the future are but
A．to be a lawyer
B．to move out of Utah
C．to be a single mother
第9题
What will Mr Murdoch do to get more customers？
A．to offer better service and develop the most advanced technology
B．to invite more experts
C．to get customers through in 30 seconds
第10题
Why do summer schools arrange visits and other activities for the students？
A．To attract more students.
B．To make the courses suitable for students of all levels.
C．To let the students have a good rest.
D．To help everyone to make new friends, have fun and improve their English.
