公钥密码体制有加密模型与认证模型两种,在加密模型中使用______对明文进行加密。A

题型:单项选择题

问题:

公钥密码体制有加密模型与认证模型两种,在加密模型中使用______对明文进行加密。

A.发送者的公钥

B.发送者的私钥

C.接收者的公钥

D.接收者的私钥

考点:计算机等级考试网络技术三级网络技术笔试84
题型:单项选择题

下列国家名按音序排列正确的一项是

(1)中  (2)美  (3)法   (4)英   (5)俄

(6)德  (7)日  (8)新加坡 (9)加拿大 (10)巴西[ ]

A.(10)(6)(5)(4)(3)(2)(1)(8)(7)(9)

B.(10)(6)(5)(3)(9)(2)(7)(8)(4)(1)

C.(10)(5)(6)(4)(9)(2)(7)(8)(1)(3)

D.(10)(6)(5)(2)(9)(7)(8)(3)(4)(1)

题型:单项选择题

一只空瓶子装满水时总质量是400g,装满酒精时的总质量是350g。已知酒精的密度为水密度的0.8倍,则下列说法中正确的是

A.空瓶的质量为150g

B.瓶子的容积为300cm3

C.空瓶的质量为100g

D.瓶子的容积为250cm3

题型:单项选择题

某县城梁某纠集罗某等六人成立“斧头帮”,自命为帮主。梁某要求属下“尽一切可能为本帮筹集资金作为帮费”。罗某等人在半年内盗窃3次、抢劫5次、诈骗2次、打架斗殴致2人重伤,非法所得财物若干。上述行为中梁某参与抢劫3次,其余行为并未参与,但有的知道,有的不知道,后该帮被群众举报,下列说法正确的是:()

A.孙某应对所有的犯罪行为承担责任

B.孙某应对知道的犯罪行为承担责任

C.孙某应对参与的犯罪行为承担责任

D.孙某应对指挥的犯罪行为承担责任

题型:单项选择题

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.

     People generally use spices (香料) every day when preparing meals.Most of these spices are readily

available in local supermarkets.However, in the 15th and 16th centuries, spices were as valuable as gold or diamonds.Spices are small plants or parts of plants, such as ginger, pepper, vanilla, and cinnamon, which

are used to add flavor to our food.__1 __ Such a use for spices actually goes all the way back to Roman

times.The Romans used spices such as cumin and coriander to help preserve food.

     The spices came to Europe from countries to the east, such as the islands in the East Indies, Sri Lanka, and India. __2__ Because of the long journeys involved, they were very expensive.

     European sailors began to look for routes to these countries themselves in order to bring back the

spices by sea.In 1498, a Portuguese explorer named Vasco Da Gama reached an East Indies island called Calicut. __3__ In 1519, another Spanish explorer, Ferdinand Magellan, found a new trade route by sailing west across the Atlantic Ocean, around the southern tips of both South America and Africa, and back to

Europe.

     __4__ Portugal was the leader until the end of the 16th century.Spain was in control during much of the next 100 years.Then, Holland took over.The Dutch controlled the East Indies, but, in 1780, England

defeated them in a famous war.__5__  They treated the people there badly and made them submit to the

British government.

     India finally became independent from Britain in the 1940s.Today, it is still called "the land of spices".

In fact, at present India produces 2.5 million tons of spices each year and produced more types of spices

than any  other country.

A. For centuries, Arab traders had carried the spices over land and sold them to European countries.

B. For the next four centuries, Western countries raced each other for control of the spice trade in these

     new countries, which they called the "New World".

C. Though they might not be as valuable today as gold or diamonds, spices are still big business around

     the globe.

D. Six years earlier, Spanish explorer Christopher Columbus had been looking for spices when he

     discovered America.

E. The English then moved from the islands into India.

F. The history of spice is almost as old as human civilization.

G. In those times, spices also helped keep meat from spoiling.

题型:单项选择题

为了提高测试的效率,应该 ______。

A.随机地选取测试数据

B.取一切可能的输入数据作为测试数据

C.在完成编码以后制定软件的测试计划

D.选择发现错误可能性大的数据作为测试数据

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