Contrary to popular belief, concrete and cement are not the same thing; cement is actually just a component of concrete. Concrete is made up of three basic components: water, aggregate (rock, sand, or gravel) and Portland cement. Cement, usually in powder form, acts as a binding agent whe...
than we find in English. It is true that the absenceof such evidence does not disprove the theory, but in6___ other grounds too the theory is not very attractive. People of all races and languages make rather similar noises in return to pain or pleasu...
“What ___ used as chief building materials today” 是主语从句,“steel and concrete” 是表语。这里需要一个系动词,从选项看,is 和 has been 可供选择。因为这里表达 “什么被用作……”,是被动语态的结构,被动语态的基本形式是 “be + 过去分词”,所以这里不能用 has been(has been 是现在完成时的...
Precast is a method of industrialized design, production and construction using precast concrete products. The industrialized process is an advantage that enables quick long-line production, standardized components, the calculated positioning of details, and uncomplicated documentation. Fast, profitable, and...
What if some of the sand in concrete could be replaced (代省)of diapers are thrown away each year, causing a great deal of pollution.So Ms Zuraid a and her team set out to study the problem. They collected used diapers, cleaned them up, and treated the diapers with chemicals to kill...
or hear any of these things. You can see a person who is feelingdoubtand you can describe examples ofchaos, but these things don’t exist as tangible objects. While you can imagine a singular concrete manifestation of an apple or a chair, you cannot do that with a noun likedoubt.And ...
Some concrete noun examples are:The tree was 100 years old.The family traveled by bus. I want to read a book. 6. Plural nounA plural noun is used to indicate more than one of a place, thing, person, animal, or idea. Plural nouns are represented by words that are made plural by ...
D1 In the process of making concrete,what do the scientists worry about? A. It is too hard. B. It is too expensive. C. It is not safe. D. It pollutes the environment. A、2 What's the Chinese meaning of the underlined phrase "get rid of" in Paragraph 5? A.去除 B.制造 C....
Seen as one of the great promises for the future of construction, carbon concrete mixes strength, lightness and flexibility.
The Romans made the material.We had to figure out how they did it so that we can make better materials-and then, you know, in turn, be better protectors of our environment."( A )8. What can we learn from paragraph 1? A. Roman concrete is essential to the architecture's strength...