问题 问答题

在下列材料中(1)有机玻璃;(2)玻璃;(3)贮氢合金;(4)涤纶;(5)人工关节、人工骨;(6)飞机用坚铝;(7)聚氯乙烯(PVC);(8)钢筋混凝土;(9)记忆合金;(10)玻璃钢;(11)合成橡胶;(12)包装材料铝箔;(13)碳纤维复合材料;(14)不锈钢;(15)聚乙烯薄膜;(16)耐高温高强度陶瓷.

①属于金属材料的序号______.

②属于无机非金属材料的序号______.

③属于有机合成材料的序号______.

④属于复合材料的序号______.

答案

①金属材料包括金属单质与合金,贮氢合金、飞机用坚铝、记忆合金、不锈钢它们都属于合金,人工关节和人工骨是由钛合金制造的,都属于金属材料;包装材料铝箔属金属单质属金属材料.

②无机非金属材料主要为无机盐,如玻璃、陶瓷等;玻璃、耐高温高强度陶瓷属于无机非金属材料;碳纤维属非金属材料.

③有机合成材料包括塑料、合成橡胶、合成纤维,涤纶、聚氯乙烯(PVC)、合成橡胶、聚乙烯薄膜属有机合成材料;有机玻璃既轻巧,又坚韧,化学性又相当稳定,受热而且有可塑性,因此它的用途十分广泛,是一种高分子塑料,属于合成材料.

④复合材料是把多种材料复合在一起得到的一种具有特别性能的材料.玻璃钢是玻璃纤维与合成材料复合而成的一种特殊材料,属于复合材料;钢筋混凝土是由金属材料和无机非金属材料复合而成的复合材料.

故答案:①(3)(5)(6)(9)(12)(14);②(2)(13)(16);③(1)(4)(7)(11)(15);④(8)(10).

单项选择题
阅读理解

For as long as humans have lived on the earth, they have made use of various forms of communication. Generally, this expression of thoughts and feelings has been in the form of oral speech. When there is a spoken language problem, communication can be carried out through sign language, in which gestures stand for letters, words, and ideas. Tourists and people unable to hear or speak have often had to turn to this form of expression. When gestures describe words or ideas, they can often be used internationally. When used for spelling words however, where each gesture stands for a single letter, people must share the same written language.

Body language sends ideas or thoughts by certain actions, either meaningfully or not. A wink can be a way of showing that the person is only joking. A nod means agreement, while shaking the head indicates disagreement.

Other forms of language can be found in Braille (a reading system of raised dots read with the fingertips used by the blind), signal flags, Morse code, and smoke signals. Road maps and picture signs also guide and warn people. While language is the most common form of communication, other systems and techniques also express human thoughts and feelings.

小题1:What does the author mainly want to say?        

A.People can communicate in many different ways.

B.Everybody uses only one form of communication.

C.Language is invaluable to foreigners.

D.Non-spoken communication is of little value.小题2:According to the text, which part of the body can be used to show you are joking?

A.Fingers.

B.Eyes.

C.Head.

D.Feet.小题3:What can’t be effectively communicated by sign language when people belong to different language groups?

A.Spelling.

B.Idea.

C.Whole words.

D.Expressions.小题4:How many different forms of communication are mentioned in the text?

A.Three.

B.Five.

C.Six.

D.Nine.