单词拼写(共15小题,每小题1分,共15分) 小题1:The officers

题型:听力题

问题:

单词拼写(共15小题,每小题1分,共15分)

小题1:The officers on duty have ____________(克服) all the difficulties, many of them in tears.

小题2:The Spring Festival Gala was broadcast live without ____________ (打断).

小题3:It was the boy that was scolded for not____________ (道歉)to the girl who was made fun of by him.

小题4:By ____________ (积累) as much wealth as possible, they finally came into power with their own financial support.

小题5:“It’s now or never!” she exclaimed, and she knew she shouldn’t have ____________ (犹豫).

小题6: Large ____________ (数量) of money have been put into the research to find out the cause for the cancer. http://www. .com/

小题7:Of course, no country has the ____________ (特权)of fishing in our coastal water.

小题8:A distant ____________ (亲戚)is not as good as a near neighbour.

小题9:Eating out ____________ (吸引) to me in my childhood, but it can’t now.

小题10:Having worked hard for such a long time, I can ____________ (自信地) promise that this year is going to be very different. http://www. .com/

小题11:As a designer, ____________ (想象) that customers are critical is very important.

小题12:He has no ____________ (抱负) or aim in his life. He only drifts along.

小题13:The Prime Minister ____________ (后悔)not having mentioned the problem at the international conference.

小题14:We think that he is the most ____________ (体贴的) person we have ever met.

小题15:____________ (沮丧) about her future, she began to take drugs and became addicted to it.

考点:单词、词组
题型:听力题

相对于ADSL2+技术,以下特性中是ADSL具有的()。

A.1bits星座编码

B.线路速率粒度固定为32K

C.导频上可承载比特

D.SRA无缝速率适配技术

题型:听力题

实验目的:探究过氧化钠与水反应后的溶液滴加酚酞试液先变红后退色的原因。

[分析与猜想]

(1)根据过氧化钠与水反应的原理:2Na2O2 + 2H2O =" 4NaOH" + O2↑,往过氧化钠固体完全溶解反应后的溶液中滴加酚酞本应只会变红而不会退色,而实验中发现酚酞变红后又退色。由此提出如下的猜想:

A.氧气有漂白性

B.氢氧化钠有漂白性

C.                                          

[实验与判断] 请完成下列表格:

实验编号123
实验装置
验证猜想               C          
实验现象溶液变红后不退色
实验说明1、2的实验中NaOH溶液是用    (填“氢氧化钠固体”、“氧化钠固体”、“过氧化钠固体”)溶于水配制的。
 

(2)根据以上实验分析发现:过氧化钠与水反应过程中,钠元素形成了稳定的化合物,溶液中还生成了一种不很稳定、具有漂白性的物质X,X的化学式是      

(3)可用右图装置对溶液中不很稳定的物质进行探究,在①处装入的物质是   (填选项,下同),②处装入的物质是   

A.酚酞试剂             B.过氧化钠与水反应后的溶液

C.二氧化锰             D.氢氧化钠固体配制的溶液

(4)气体③是   ,过氧化钠与水反应的化学方程式没有写出X来,原因是      

题型:听力题

蛛网膜下腔出血后,可引起一系列颅内、外的病理过程,包括有()

A.颅内压增高

B.脑积水

C.各种炎性反应

D.下丘脑激素分泌紊乱

E.植物神经功能紊乱

题型:听力题

过滤的目的是将()与()分离,通常过滤是通过滤纸或()或()。

题型:听力题

根据我国现行规定,施工企业计提折旧一般采用( )。

A.平均年限法

B.双倍余额递减法

C.年数总和法

D.加速折旧法

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