That's why it was prized," says Greenfield. But when industrialization arrived in the mid-19th century, the demand for textiles increased dramatically and created a need for more cost-effective dyes. Chemists began to use petroleum and coal to formulate synthetic ones, ultimately reducing the ...
In 1698, when the steam engine was first invented, it was coal that fuelled it. Coal has been a major source of fuel for humankind for hundreds and thousands of years now. This carbon-rich, primary fossil fuel has powered the human civilization right from the time it was known. Before p...
In the days when coal was so (widely) used, (no one) realized how soon and how (complete) oil would replace (it). A.widelyB.no oneC.completeD.it 答案 C[解析] 应改为completely。在本句中,soon和completely用来修饰动词replace。how修饰两个副词,soon和completely并列。相关推荐 1In the days ...
HowCoalWashowcoalwas 系统标签: coalformedlignitesubbituminousbituminousmining HOWCOALWASFORMED Coalisacombustibleblackorbrownish-blacksedimentaryrockcomposed mostlyofcarbonandhydrocarbons.Itisthemostabundantfossilfuelproduced intheUnitedStates. Coalisanonrenewableenergysourcebecauseittakesmillionsofyearstocreate. Theener...
[translate] aNewest "Philippines" Search 最新的“菲律宾”查寻 [translate] ain the days when coal was so extensive used, no one was sure how soon and how completely oil would replace it 在天,当煤炭是那么广泛使用,没人是肯定的多快和多么完全地上油将替换它 [translate] ...
The first Pentium processor was released in 1993 with 3.2 million transistors, and current chips can contain up to 20 million transistors. In order to experiment with gates, we are going to go back in time a bit and use SSI ICs. These chips are still widely available and are extremely ...
She moved from Russia many years ago and was surprised to see the abundance of food available(供应的丰富食物) in the supermarkets. And she found that people were buying more than they needed and throwing too much away. She advised some supermarkets to stop selling their food in bulk(批量) ...
The child was found alive by the roadside. 人们在路边发现这孩子活着。 living 既可作表语又可作定语,可用于人也可用于物或比喻场合。 如: Of all living writers, I admire Mr. Shaw most. 在所有作家中,我钦佩萧先生。 live 仅作定语,除在诙谐的场合用于人外,主要用于动物和无生命的东西。如:a live...
But that is not the whole story. The electricity used to power the car had to be generated somewhere. If it was generated at a power plant that used a combustion process (rather than nuclear, hydroelectric, solar or wind), then only about 40 percent of the fuel required by the power pl...
通读全文,结合第一段的“A new study showed evidence of how coal burning which was caused by a volcanic eruption resulted in climate change in Siberia, It discovered the first direct evidence of how extensive burning of coal in Siberia caused the Permian-Triassic(二叠纪至三叠纪)Mass Extinction ...