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【单选题】
Computer people talk lots about the need for other people to become 'computer literate '. But not all experts think it a good idea. One pioneer, in particular, who disagrees, is David Debut, the founder of Computer town UK. Though many people see this as a successful attempt to bring people closer to the computer, David does not see it that way. He says that Computer town UK was formed for just the opposite reason, to bring computers to people and make them 'people literate'. David Debut thinks Computer towns are most successful when tied to a computer club but he thinks there is an important difference between the two. The clubs are for people who have some computer knowledge already. This frightens away non-experts, who want to go to Computer towns where there are computers for them to operate, with experts to encourage them and answer any questions they ask. They are not told what to do, they find out. The computer experts have to learn not to tell people about computers, but have to be able to answer all questions people ask. People needn' t learn computer terms(术语). But the experts have to explain in plain language. The computars are becoming 'people literate'. Which of the following is David Debut' s idea on the relationship between people and computers?
A.
Computer learning should be made easier.
B.
There should be more computer clubs for experts.
C.
People should work harder to master computer use.
D.
Computers should be made cheaper so that people can afford them.
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A.
正确
B.
错误
【单选题】双缝干涉实验中,入射光波长为λ,用玻璃纸遮住其中一缝,若玻璃纸中光程比相同厚度的空气大2.5λ,则屏上原零级明纹中心处
A.
仍为明纹中心
B.
变为暗纹中心
C.
不是最明,也不是最暗
D.
无法确定
【简答题】2n级排列13...(2n-1)(2n)(2n-2)...2的逆序数为_______,它是______(奇/偶)排列。
【单选题】( )质量特性在考虑质量特性的内容时,必须考虑法律、法规、环保以及社会伦理等有关社会整体利益方面的要求。
A.
安全方面的
B.
社会方面的
C.
心理方面的
D.
时间方面的
【单选题】原发性高血压左心室向心性肥大的原因
A.
左心室后负荷增加
B.
左心室前负荷增加
C.
左心室心肌纤维再生性增生
D.
左心室心肌纤维内分泌性肥大
E.
心肌瘢痕不均匀增生而膨出
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起病急,可表现为头痛、发热、呕吐等。精神症状以急性脑器质性综合征为主。颈部强直及克氏征阳性是诊断的重要依据
B.
多为急性或亚急性起病,部分患者病前有上呼吸道或肠道感染史,血白细胞总数增高,脑脊液中白细胞和(或)蛋白质轻度升高,糖和氯化物正常
C.
隐袭起病,前驱期以情感症状为主,随后可有发热、头痛、呕吐、意识障碍、脑膜刺激征和颅神经损害等症状,脑脊液中糖和氯化物常降低
D.
潜隐起病,病程缓慢发展,早期多表现为记忆障碍和人格改变,多有精神、神经症状
E.
典型症状包括头痛、呕吐和谵妄,CT或MRI检查可见局灶性低密度影
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A.
起病急,可表现为头痛、发热、呕吐等。精神症状以急性脑器质性综合征为主。颈部强直及克氏征阳性是诊断的重要依据
B.
多为急性或亚急性起病,部分患者病前有上呼吸道或肠道感染史,血白细胞总数增高,脑脊液中白细胞和(或)蛋白质轻度升高,糖和氯化物正常
C.
隐袭起病,前驱期以情感症状为主,随后可有发热、头痛、呕吐、意识障碍、脑膜刺激征和颅神经损害等症状,脑脊液中糖和氯化物常降低
D.
潜隐起病,病程缓慢发展,早期多表现为记忆障碍和人格改变,多有精神、神经症状
E.
典型症状包括头痛、呕吐和谵妄,CT或MRI检查可见局灶性低密度影
【单选题】在双缝干涉实验中,入射光的波长为λ,用玻璃纸遮住双缝中的上面那个缝,干涉条纹发生的变化有:
A.
条纹间距变大;
B.
条纹间距变小;
C.
整体条纹向上移动;
D.
整体条纹向下移动.
【单选题】排列13...(2n-1)(2n)(2n-2)...2的逆序数为( ) (备注:前半部分是1,3,5, ,2n-3,2n—1,后半部分是2n,2n-2, 6,4,2)
A.
n
B.
2n
C.
n(n-1)
D.
n(n-1)/2
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