Metal is a common material in engineering. Which of the following is not a metal? A. iron B. aluminum C. glass D. copper 相关知识点: 试题来源: 解析 C。本题考查材料科学中金属的概念。铁(iron)、铝(aluminum)和铜(copper)都是常见的金属。而玻璃(glass)是一种非金属材料,主要由硅酸盐等组成。
Today,our currency(货币) is a mixture of metal coins and paper money,but it wasn't always that way.Before metal coins and paper bills existed(存在),people used a lot of unusual things to buy what they needed.In one part of the world,for example,people used the sharks' teeth for money...
E选项，deposit个人觉得应该翻译成沉积物，就是说发现了p的沉积物，所以供给增多，不再那么稀缺了，价格...
The main classifications of matter include the categories element and compound, either of which may also be called a substance (which is a less specific term), and mixture, of which there are also many sub-categories.Definition of a (Chemical) Mixture:...
A multivalent metal is an element that forms more than one type of an electrically charged particle known as ion.Metals have the tendency to form cations by losing electrons and becoming positively charged. In the periodic table of elements, the transition and the right-most metals are multivalen...
The metal is a combination of silicon (硅) and stainless steel. The metal is strong, so it can support the weight of the body. The plastic is a flexible material. It allows the joint to move easily. Medicines have been discovered that will prevent the body from rejecting the artificial ...
Metal is a common material in engineering. Which of the following is not a metal? A. iron B. aluminum C. glass D. copper 相关知识点: 试题来源: 解析 C。本题考查材料科学中金属的概念。铁(iron)、铝(aluminum)和铜(copper)都是常见的金属。而玻璃(glass)是一种非金属材料,主要由硅酸盐等组成...
What's the difference between metal credit cards and plastic credit cards? How to destroy a metal credit card Do metal credit cards offer rewards? Who should get a metal credit card? Are metal credit cards or plastic better for you? Key Takeaways Metal credit cards may be perceived as a ...
Metal (金属) The machine is made of metal. 这台机器是由金属制成的。 Aluminium (铝) The airplane parts are crafted from aluminium. 飞机的零件是用铝制造的。 Iron (铁) The bridge is constructed with iron beams for strength and durability. ...
4. Metal mesh ceiling panels are also highly durable and low maintenance. Metal is a lightweight material that is resistant to corrosion and weathering, making it ideal for use in high-humidity or outdoor environments. The panels can also be easily ...