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【单选题】
3DES在DES的基础上，使用两个56位的密钥K1和K2，发送K1加密，K2解密，再用K1加密。接受K1解密，K2加密，再用K1解密，这相当于使用(53)倍于DES的密钥长度的加密效果。
A.
1
B.
2
C.
3
D.
6
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参考答案：
举一反三
【单选题】What problem did Clotfelter face when he studied the effect of schools' extracurricular activities?
A.
Students were unwilling to cooperate when he conducted the poll.
B.
There was no available data of the racial composition of every school.
C.
He found it impossible to catalogue the structural feature of all high schools.
D.
It was difficult to compare the racial makeup of the clubs and sports teams.
查看完整题目与答案
【单选题】What effect(效果) did Fizzy Lifting Drinks have?
A.
It could make you happy.
B.
It could relieve（缓解）your thirst.
C.
It could make you forget unhappy things.
D.
It could lift you into the air.
查看完整题目与答案
【简答题】指出下列各句中的偏义复词并加以解释。 1、于是焉河伯始旋其面目,望洋向若而叹。 2、臣不才,不胜其任,以为俘馘。 3、昼夜勤作息,伶俜索苦辛。 4、陟罚臧否,不宜异同。 5、今杀人之相,相又国君之亲,此其势不可以多人。多人,不能无生得失,生得失则语泄。 6、夫人......爪牙不足以供嗜欲,趋走不足以避利害。 7、今公常从数骑,一旦有缓急,宁足恃乎! 8、魏其之东朝,盛推灌夫之善,言其醉饱得过,乃...
查看完整题目与答案
【单选题】According to the data in Figure 3, what effect, if any,did removing the herbaceous layer have on the percent distribution among the 1-year-old seedlings in the 1-hectare area of the forest? The remova...
A.
changed the percent for the northern red oak only.
B.
changed the percent for the red maple and the percent for the white pine only.
C.
changed the percent for each of the 5 tree species.
D.
did not change the percent for any of the 5 tree species.
查看完整题目与答案
【判断题】中国古代编钟的内部是椭圆形的。()
A.
正确
B.
错误
查看完整题目与答案
【单选题】In the study of students exposed to classic music, what effect did the music have?
A.
It increased the students' while blood cell count.
B.
It increased some students' energy level.
C.
It improved the students' ability to play musical instruments.
D.
It released a natural painkiller in some students' bodies.
查看完整题目与答案
【单选题】关于医学心理学研究的任务错误的是
A.
研究疾病的病因、病理及早期症状
B.
研究心理行为因素对健康的影响机制
C.
研究心理行为因素在疾病发生、发展过程中的影响规律
D.
研究心理评估、心理咨询的理论和方法
E.
研究通过心理行为调整达到预防和治疗疾病的作用及机制
查看完整题目与答案
【单选题】除哪一项外，均为高渗性脱水的特点（）
A.
高热、出汗多而饮水不足
B.
烦躁不安、惊厥、肌张力高
C.
细胞内、外液均少
D.
无明显口渴
E.
可出现脑出血或脑血栓形成
查看完整题目与答案
【单选题】What effect(效果)did Vitamin Wonka have?
A.
It could make the toes grow until they were as long as the fingers.
B.
It could make people sick.
C.
It could make people grow horns on the top of the head.
D.
It could make you stronger.
查看完整题目与答案
【单选题】下列关于债项评级的说法中,错误的是()。
A.
在第一维度客户评级中，商业银行应对每个客户名下的每笔债项进行独立的债项评级
B.
客户评级的量化基于对违约概率的估计
C.
债项评级的量化可以是违约损失率
D.
债项评级的量化可以是预期损失
查看完整题目与答案
相关题目：
【单选题】What problem did Clotfelter face when he studied the effect of schools' extracurricular activities?
A.
Students were unwilling to cooperate when he conducted the poll.
B.
There was no available data of the racial composition of every school.
C.
He found it impossible to catalogue the structural feature of all high schools.
D.
It was difficult to compare the racial makeup of the clubs and sports teams.
查看完整题目与答案
【单选题】What effect(效果) did Fizzy Lifting Drinks have?
A.
It could make you happy.
B.
It could relieve（缓解）your thirst.
C.
It could make you forget unhappy things.
D.
It could lift you into the air.
查看完整题目与答案
【简答题】指出下列各句中的偏义复词并加以解释。 1、于是焉河伯始旋其面目,望洋向若而叹。 2、臣不才,不胜其任,以为俘馘。 3、昼夜勤作息,伶俜索苦辛。 4、陟罚臧否,不宜异同。 5、今杀人之相,相又国君之亲,此其势不可以多人。多人,不能无生得失,生得失则语泄。 6、夫人......爪牙不足以供嗜欲,趋走不足以避利害。 7、今公常从数骑,一旦有缓急,宁足恃乎! 8、魏其之东朝,盛推灌夫之善,言其醉饱得过,乃...
查看完整题目与答案
【单选题】According to the data in Figure 3, what effect, if any,did removing the herbaceous layer have on the percent distribution among the 1-year-old seedlings in the 1-hectare area of the forest? The remova...
A.
changed the percent for the northern red oak only.
B.
changed the percent for the red maple and the percent for the white pine only.
C.
changed the percent for each of the 5 tree species.
D.
did not change the percent for any of the 5 tree species.
查看完整题目与答案
【判断题】中国古代编钟的内部是椭圆形的。()
A.
正确
B.
错误
查看完整题目与答案
【单选题】In the study of students exposed to classic music, what effect did the music have?
A.
It increased the students' while blood cell count.
B.
It increased some students' energy level.
C.
It improved the students' ability to play musical instruments.
D.
It released a natural painkiller in some students' bodies.
查看完整题目与答案
【单选题】关于医学心理学研究的任务错误的是
A.
研究疾病的病因、病理及早期症状
B.
研究心理行为因素对健康的影响机制
C.
研究心理行为因素在疾病发生、发展过程中的影响规律
D.
研究心理评估、心理咨询的理论和方法
E.
研究通过心理行为调整达到预防和治疗疾病的作用及机制
查看完整题目与答案
【单选题】除哪一项外，均为高渗性脱水的特点（）
A.
高热、出汗多而饮水不足
B.
烦躁不安、惊厥、肌张力高
C.
细胞内、外液均少
D.
无明显口渴
E.
可出现脑出血或脑血栓形成
查看完整题目与答案
【单选题】What effect(效果)did Vitamin Wonka have?
A.
It could make the toes grow until they were as long as the fingers.
B.
It could make people sick.
C.
It could make people grow horns on the top of the head.
D.
It could make you stronger.
查看完整题目与答案
【单选题】下列关于债项评级的说法中,错误的是()。
A.
在第一维度客户评级中，商业银行应对每个客户名下的每笔债项进行独立的债项评级
B.
客户评级的量化基于对违约概率的估计
C.
债项评级的量化可以是违约损失率
D.
债项评级的量化可以是预期损失
查看完整题目与答案
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