Most people believe that pencils are made from lead, but this isn’t quite true. They’re actually made of a mineral called graphite (石墨). 1During the late Middle Ages, in a village called Borrowdale, in England, a group of locals saw a few uprooted trees.2On e of them had the ...
+Many years ago,people in Egypt used-lead(铅)to write.Now pencils-are made-from-graphite(石墨)instead of lead.-In-1564,people-found that graphite-could-leave-black marks.At first,people-used it to make marks on their sheep.Later they used the graphite to write.They-thought it was -...
根据“That’s why she has three pens, three rulers and three pencils”可知,她最喜欢的数字是三,故选C。 29.【答案】A 【解析】句意:她的电话号码是多少?what’s什么是;who’s谁是;how’s怎么样;where’s在哪里。根据“what’s ...
the pencils are now readyWord Bankto be sold. However, most of them sill need the last step.clay/kle:/n.黏土;陶土5.graphite /'graefaut/n.石墨lead /lid/n.芯After all of this, the pencils can be put in the box and sold now.根据材料内容,从下面五个选项中选出能填入文中空缺处的最佳...
Pencils are generally graded using the 'Graphite Scale(石墨含量)' which(1) measures(measure) how soft or hard the lead is. Graphite is a naturally soft substance and clay is mixed with it to make it harder,(2) meaning(mean) a lead with a high graphite content is known as a soft lead...
Moleskine pencils are made of cedar wood with matte finishing and a 3 mm lead. The fluorescent pencils are made of lime wood, painted matte black with an orange or yellow base and fluorescent lead. The two sets include a plastic cap to clip the pencil to a notebook cover on a rubberized...
Lead -inWhat’s our city famous for Food Artwork Other products Pre-writingA:What’s your city famous for B:Our city is famous for making lanterns.A:Really! What are they made of B:They’re made of bamboo, silk or paper.A:What can they do B:They were first used for lighting in ...
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Did you know that 14 billion pencils are made around the world each year? Most people don't know about the journey each pencil takes before it ends up in your hand. Think about it: The wood might come from trees in Oregon. The "lead" (which is actually graphite) could be from Sri ...
Many years ago,people in Egypt used lead(铅)to write.Now,pencils are made from graphite(石墨)instead of lead.In 1564,people found that graphite could leave black marks.In the beginning,the people used it to make marks on their sheep.Later they used the graphite to write.They thought it ...