A.Today pencils are not made from lead or graphite. B.The first wood pencils were made in America. C.German people first used mixed materials to make pencils. D.People first used graphite to make marks on their sheep.相关知识点: 试题...
Pencils are often made from ___. A. paper B. rubber C. graphite D. cloth 相关知识点: 试题来源: 解析 C。本题考查铅笔制作材料的词汇。A 选项“paper”意为“纸”,铅笔不是用纸做的;B 选项“rubber”意为“橡胶”,不是铅笔的制作材料;D 选项“cloth”意为“布”,与铅笔制作无关。C 选项“...
B. France couldn’t get pencils from both the English and the Germans C. he couldn’t find enough graphite in France D. he wanted to put a small eraser on top of a pencil 5.Which of the following is NOT true? A. Today pencils are not made from lead or graphite. ...
Another very popular and highly recommended pencil among graphite artists for creating dark areas is the Faber Castell 9000 series. With a super smooth graphite lead, they are perfect for layering and blending. The range of B pencils including the 8B are capable of producing good blacks and dark...
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 ...
There are many kinds of pencils:some have erasers on top; some are colorful You may have used many kinds of them for ma ny years,but do you know the history of pencils?Many years ago,people in Egypt used lead (铅) to write Now, pencils are made from graphite (石墨) instead of ...
T here are many kinds of pencils:some have erasers on top ;some are colorful. You may have use d many kinds of them f or many years,but do you know the history of pencils?Many years ago, people in Egypt use d lead(铅) to write. Now, pencils are made from graphite (石墨) ...
There is no lead in a “lead pencil.” The core is instead made of a mixture of graphite and wax or oil. The hardest graphite available is 9H, while the softest is 9B. Most eraser-tipped pencils fall between 2H and 4B. There is no standardized graphite grading scale, so graphite hard...
Graphite design: why send them off to school with a boring old yellow No. 2? There are plenty of pencils to add pizzazz to schoolwork tasks.(ON TREND: BACK TO SCHOOL)
None of those hours are enough for each group. Not enough sleep can cause many kinds of problems in children and teenagers. In 2007, Shanghai Municipal Education Commission asked primary and middle schools in the city to adjust their timetables so that students could get more sleep. Two years...