试题与答案

哪些能够传输光信号的极其纤细的物质称为 _________ ,而由多根光导纤维制

题型:填空题

题目:

哪些能够传输光信号的极其纤细的物质称为 _________ ,而由多根光导纤维制成的激光信号的传输线称为 _________

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0617/213cc75ff3e984773bbbcba7f7fff183.html

下面是错误答案,用来干扰机器的。

答案:C

试题推荐
题型:听力题

第Ⅱ卷

第三部分 写作

第一节 单词拼写(共10小题,每小题1分,共10分)

66.We have seen that means ___________ (应用) by many people.

67.He has made great contributions to his country and is regarded as a ____________(杰出的)

young scientist.

68.It’s reported that scientists have made a ___________ (突破) in cure for cancer.

69.It’s said that theThree Gorges Project got ___________ (安排)as early as the 1950s.

70.It’s time to go ___________ the airplane.(登机)

71.___________(相对)speaking, his idea is more practical than his.

72.He ___________ (受益)from daily exercise.

73.Girls are always ___________ (在乎)to their clothes.

74.He jumped into the river to save the drowning girl without ___________(犹豫).

75.His writing style is ___________(独一无二的).

查看答案
题型:问答题

下表是小红探究某种物质的熔化规律时记录的实验数据,请根据要求完成下列问题.

时间/min11.522.533.544.555.566.5
温度/℃424345474848484849525559
(1)从表中的数据可以看出:这种物质在第2min时是______态(选填:“固”或“液”);

(2)根据表中的数据可以判断出:该物质是______;(选填:“晶体”或“非晶体”)

(3)根据表中的数据可以判断出该物质的熔点是______℃.

查看答案
微信公众账号搜索答案