题目内容
The compass(罗盘) is a device that is absolutely necessary for the【56】of ships and airplanes. Hikers often need a compass, too. Anyone who does not use 【57】roads should have a compass.
A compass will always 【58】to know your direction. If you have a map【59】land marks such as roads, mountains, rivers, and lakes, you can immediately find out where you are. The compass 【60】you to place your map in an 【61】position according to the directions. You can then 【62】 where you are with points on the map.
The Chinese were the first people 【63】 the magnet(磁铁)【64】a compass. They first used compasses to 【65】their ships between the years 100 B. C. and A.D. 100. their compasses were simple and 【66】devices.【67】The magnetic iron into their compass, these early seamen placed the magnet on a cork or a piece of straw. They then put the iron-cork system in a bowl of water, the【68】magnet turned easily, aligning(排成列) itself with the directions north and【69】.
Later the Chinese invention was put together【70】a Babylonian invention, the degree. Then the compass became 【71】. Compasses 【72】well on wooden ships.【73】, when metal ships appeared in the 1800s, the simple magnetic compass was【74】. the metal in the ship【75】the magnet. Modem ships now use the gyrocompass and the radio compass for navigation.
(46)
查看答案
搜索结果不匹配？点我反馈
更多问题
In their letter to the students' representative assembly, the freshmen insisted on in the
Henry built race cars in the 1890’s and even became a race car driver. But he wanted to build cars for everyone: to use, so he began the Ford Motor Company in 1903. He had formulated (制定) a business motto which would be the reason for his success. "The way to make automobiles is to make one automobile like another automobile, to make them all alike." His company declared that they could make automobiles in any color, as long as it was black.
Henry gave much credit to his wife whom he called "The Believer". From the earliest days of their relationship she was the one who encouraged him to build a horseless carriage. Her belief in him was a constant encouragement to produce what would become tile primary mode of transportation in the future.
Henry's greatest task was to produce a gasoline engine that would be the power for his car. He finally produced so many hours each day that his friends called him crazy Henry. tie was inspired to work until his invention would work effectively.
When he designed the Model T, he decided he could build it cheaply for what he called "the great multitude(批量)." To do this he had to design an assemble line where many cars could be bilt in a single day. Each worker would have only his individual parts to put on each car. Then he could limit himself to the few tools needed for the task.
The Model T was introduced in 1908 and began to be produced on an assembly line in 1913. Henry Ford was the major figure in the auto industry for the next fifteen years.
On May 26, 1927, Henry watched the 15 millionth Model T Ford roll off the assembly tine. He had become the richest man in America. He was able to bring the price low enough so that most Americans could buy his car. This gave every family much independence, for they could move about freely without the aid of others’ transporting them.
Because he did not change his Model T, others began experimenting with different types of cars. However, the Ford Motor Company still exists and all car owners are indebted (受惠于) to the creation of the automobile by Henry Ford.
To make cars, Henry first of all needed ______.
He had the "right" accent, ______ middle - class parents in court, reliable witnesses, and
右边的哪个盒子不能由左边给定的图形做成？
微信支付 
支付宝支付