We use them every day.Stone is a hard, heavy material. Most stones sink to the bottom of water. We get stone from the ground and from mountains. Stone does not bend, but it can be cut into shapes.We get metal f
【小题5】Because being able to make metals into tools was an important skill in the Middle Ages. 【解析】【分析】本文主要讲述英美姓氏的来历。【小题1】问题:许多美国人的名字是从哪里来的?考查细节理解题。根据第一段第1句Many American names come from England.(许多美国人的名字来自英国。)结合题...
Are beams available in other metals? In addition to structural steel, beams can be formed out of aluminum through the process of extrusion. Kloeckner supplies aluminum beam in 6061 aluminum. Unlike carbon steel beams, 6061 aluminum beam is often seen in the automotive industry. What are the key...
Some groups in the periodic table are lucky enough to have their own names. Which groups are those and what are their names? What is the name of the Group of the Periodic Table in which all the elements have a valence shell electron configuration ns^2np...
The name "grape agate" has stuck as a marketing term. However, the name is a misnomer. Misnomers are names that are scientifically incorrect. There are no arguments with "grape" because of its purple color. But, the use of "agate" as a species/variety name draws objections. Here is an...
the English language is Smith.Being able to make metals(金属)into tools was an important skill in the Middle Ages,and many people were trained as blacksmiths.可知因为在中世纪能够使金属工具是重要的.故答案为Because being able to make meyals into tools was an important still in the Middle Ages...
What are the names of the elements with the following symbols? (a) Ne (b) Li (c) He Elements of the Periodic Table: Most of the elements of the periodic table were named arbitrarily (e.g. Indium is named after the Latin word indicium for violet). As such, we o...
3.由It was 300 or 400 years before the extra (附加的) names gradually developed into last names, or surna mes.可知答案。 4.根据Many surnames were based on father-son relati ons.可知答案。 5.由Being able to make metals (金属) into tools was an important skill in the Middle Ages, and...
Metalloids are elements that have properties in between those of metals and nonmetals. The physical properties of metalloids are similar to those of metals, they are solid and lustrous, while the chemical properties are similar to those of nonmetals since they tend to gain electrons. ...
The most common occupational name is Smith, which means a person who makes things with iron or other metals. In the past, smiths were very important workers in every town and village. Some other occupational names are: Carter— a person who owned or drove a cart; Potter—a person who ...