问题 问答题


(一)
某高速公路工程项目,施工项目经理部为了更好地对施工现场材料进行管理,根据工程的性质、工期和施工条件,同时考虑材料供应市场情况的影响,对主要施工材料提出了如下要求:
(1)使用土质材料时必须了解其主要的物理机械特性。
(2)用于施工的粗骨料应具有足够的强度和耐磨性,并且清洁、干燥、无风化、无杂质。
(3)施工用石粉应采用合成性岩石磨制的石粉,并且不应含泥土杂质和团粒。
(4)施工用水泥中的氧化镁和三氧化硫含量应符合规定。
(5)用于路面底层的粉煤灰应按等级使用。
(6)施工用水泥混凝土中的水泥应采用专用水泥。
(7)施工中用沥青和钢材必须符合各项规定。
问题:

公路工程施工用的主要材料有哪些

答案

参考答案:

解析:公路工程施工用主要材料有土质材料、砂石材料、水泥、石灰、粉煤灰、水泥混凝土、沥青材料、沥青混合料和钢材。

阅读理解

选做题:根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

                                                           Linguistic (语言学的) Puzzles

     How did language begin? What was the world's first language? Do all languages come from one, original

language? 1_____.

     In the 4th century BC, the Creek historian Herodotus wrote this account: Psamtik I an Egyptian King,

wanted to find out what the oldest language in the world was. 2_____. He told his servant to find two newborn

babies. When the servant had found them, the king gave them to a shepherd (牧羊人) and said, "Keep these

babies with the goats. Take care of them, but do not talk to them. Listen for any words that they say." The king

wanted to find out what 1anguage the children would speak if they were left alone. He said, "The first words

they speak will come from the original language of the world." 

     3_____. He told the king, who asked his scholars about this word. They told him that the Phiygians, who

lived in an area which is now Turkey, called bread "becos." The king said, "Then Phiygian is the oldest

language."Today we know that the king's conclusion was wrong. We don't know why the children said "becos".

     4_____. Scholars discovered that many European and southern Asian languages belonged to the same"family"

and that they star- ted from the same parent language, Proto-Indo-European. Linguists think that it had split into

several different languages, including Greek and Sanskrit, between 2,000 and 1,000 BC. Other languages, such

as English and Spanish, developed from later splits.

     5_____. Two questions that interest linguists are: How does language change? Why does language. change?

If you like solving mysteries, historical linguistics may be the job for you.

A. Nowadays, we study the origin of language more scientifically

B. He was talking about this problem with his scholars when he had an idea

C. The king was very kind to his servant and his servant remained royal to him

D. Linguists are the scholars who are very interested in categorizing the language families

E. People have been trying to find the answers to these questions for more than 2,000 years

F. One day, while the babies were babbling to each other, the shepherd heard them say "becos"

G. Linguists have classified many language families, and they are still trying to categorize others

单项选择题