数据加密标准(DES)是一种分组密码,将明文分成大小______位的块进行加密A)

题型:单项选择题

问题:

数据加密标准(DES)是一种分组密码,将明文分成大小______位的块进行加密

A) 16
B) 32
C) 56
D) 64

考点:计算机等级考试网络工程师计算机网络工程师
题型:单项选择题

近年来,我国城乡居民的衣着求新、求美,讲究舒适、大方,服饰越来越靓丽;膳食讲究营养平衡,吃的越来越好;住房条件不断改善,住房越来越大、越来越好;越来越多的人圆了自己的“轿车梦”,私家车越来越多……上述材料表明[ ]

A.我国人民的生活总体上实现了由温饱到小康的历史性跨越

B.我国人民的生活水平显著提高,绝大多数人都忘记了艰苦奋斗精神

C.我国已进入了发达国家的行列

D.我国现在已经达到的小康是低水平、不全面的,发展很不平衡的小康

题型:单项选择题

根据分离方法的不同,重量分析常用的是()。

A.沉淀法和气化法

B.电解法

C.萃取法

D.气化失重法和吸收剂增重法

题型:单项选择题

佝偻病活动期患儿采用维生素D突击疗法治疗后多久需改为预防量

A.1个月
B.2个月
C.3个月
D.4个月
E.5个月

题型:单项选择题

My father was Chief Engineer of a merchant ship, which was sunk in World War Ⅱ. The book Night of the U­boats told the story.

Memories

In September ,1940,my mother ,sister and I went to Swansea ,where my father ‘s ship was getting ready to sail ,we brought him a family photography to be kept with him at all times and keep him safe .

Then I remember my mother lying face down ,sobbing .she had heard from a friend that the ship had been sunk by a torpedo (鱼雷).

I can remember the arrived of the telegram(电报),which in those days always brought bad news .my grandmother opened it ,it read ,safe .love ted.”

My most vivid memory is being woken and brought down to sit on my father’s knee, his arm in a bandage .

He was judged unfit to return to sea and took a shore job in Glasgow for the rest of the war, for as long as I can remember ,he had a weak heart ,mother said it was caused by the torpedoes .he said it was because of the cigarette ,whichever ,he died suddenly in his early 50s.

Ten years later I read night of the U-boat and able to complete the story .

A toast

In my room is the book and the photograph .often , glass in hand, I have wondered how I would have dealt with an explosion ,a sinking ship ,a jump into a vast ocean and a wait for rescue ?lest (以免 )we forget ,I have some more whisky and toast the heroes of the war.

小题1:We can infer that the mother and children went to Swansea ________.

A.to meet a friend

B.to see the father off

C.to take a family photo

D.to enjoy the sailing of the ship小题2:What did the author learn about the father from the telegram?

A.he was still alive.

B.His knee was broken.

C.His ship had been sunk.

D.He had arrived in Glasgow.小题3:The underlined word “it” in Paragraph 6 refers to the father’s ________.

A.weak heart

B.taking a shore job

C.failure to return to sea

D.injury caused by a torpedo小题4:What is the passage mainly about?

A.A group of forgotten heroes

B.A book describing a terrifying battle.

C.A ship engineer’s wartime experience.

D.A merchant’s memories of a sea rescue.

题型:单项选择题

施工进度计划,按内容范围和管理层次一般分成()、()、()三类。

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