English speakers aren’t the only ones who still follow this misnomer. The German word for “pencil” is actually “bleistifit”, which literally means “lead stick”. There was a form of writing instrument before the pencil called a stylus that sometimes was made of lead. The stylus was ...
A pencil, whose pencil lead is replaceable and can be moved by rotating a connecting piece, has a helical track provided in a pencil holder. The track is connected to the connecting piece and is in a compressed state. A sliding piece is provided in the track, and the pencil lead is ...
结果1 题目What color is the lead of a pencil usually? A. Red B. Blue C. Black or gray D. Green 相关知识点: 试题来源: 解析 C。解析:文中提到“The lead is usually black or gray.”,所以铅笔的铅芯通常是黑色或灰色。反馈 收藏
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i have to take my gra i have to tell you so i have to use the pho i have two catsone is i have two pencil cas i have two points i have used these i haven t slept i havent actually tol i havent spoken for w i havent seen you sin i havent even touched i havent slept at al...
The ‘lead’ in a pencil is made of a mixture of graphite and clay. When the percentage of graphite is increased, the pencil slides across the paper more easily. Which statement explains this observation?A.Graphite has a high melting point.B.Graphite is
The drop-lead pencil comprises a lead (2) whose rear end is provided with a thickened section which in the case of a partly opened collet (12) engages with the rear end of the latter, and thus prevents the lead from falling out of the pencil casing (10). Partial opening of the colle...
The core of a pencil is still called thelead, though it is actually made from graphite. Pencil makers developed arating system to tell the hardness of the lead in their pencils. Number 1pencils have the softest lead. They make a very dark mark. Number 4 pencilshave hard lead. They make...
Lead of pencil is made up of ……….. 01:23 One carat = ……….. Mg. 01:06 Graphite when heated with conc HNO3 forms a yellow mass known as ………... 01:32 One BTU (British thermal unit ) represents the amount of heat required... 01:08Exams IIT JEE NEET UP...
百度试题 结果1 题目The core of a pencil is made out of graphite and clay, not lead.A.FB.O 相关知识点: 试题来源: 解析 A 反馈 收藏