② When was the first dinosaur fossil discovered?A. Almost 200 years ago.B. Over 200 years ago.C. More than 65 million years ago.D. Almost 200 million years ago. 相关知识点: 试题来源: 解析 A. Almost 200 years ago. 第一块被科学界认可的恐龙化石是在1822年被发现的,距今大约200年。因此...
The British first discovered tea when sailors (水手) visited China in the 1600s.The first tea to arrive in Britain was green tea. Black tea arrived in the 1700s, but only rich people drank these kinds of tea.British people started to mix black tea and milk together. This is still how ...
was covered with black paper some strange kind of radiation was coming through and making a screen nearby glow. Rontgen could not see anything coming out of the tube but then he discovered that if he put the screen in the next room on the other side of a closed door the rays could ...
在可能发生爆炸、易燃易爆和毒害物质泄漏、建筑物倒塌、山体滑坡、溃坝决堤、林火爆燃、风向突变、水流变化等危险情况下救援时，必须进行检测和监测，应当尽量减少一线作业人员，并设立（ ），加强安全防护，留有机动力量。
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第二节The British first discovered te a when sailors(水手) visited Chin a in the 1600s.The first te a 11 arrive in Britain was green tea. Black te a arrived in 12 1700s, but only rich people drank these kinds of tea.British people started to mix black te a and milk together. ...
Passage 2 Questions 6 to 10 are based on the following passage: When aluminum was first produced about a hundred and fifty years ago, it was so difficult to separate form the ores in which it was found that its price was higher than that of gold.
The first big wave of Chinese immigration to America came when gold was discovered in California in 1848.The Chinese called the new land“ Mountain of Gold”.Those who did not become miners found work in railroad construction,farming and light industries,doing low paid jobs. By the 1880s,Amer...
His first job was as a stock boy at the Battle Creek Sanitarium. A sanitarium is a special kind of place that is a little like a hospital. A sanitarium is meant for people who are ill for a long time or who are getting over a serious illness. Will had other jobs as he got older...
What we discovered is that it’s ___ to judge what you eat only by its ___. Those tomatoes had ___ that reminded me of the ones my uncle used to grow when I was a child. Nowadays supermarket tomatoes ___ perfect but taste of water. Nobody’s going to have a ___ memory of...