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【简答题】
Read the following text and choose the most suitable heading from the list A-F for each paragraph.  There is one extra heading which you do not need. A. Impoliteness in using electronic communication devices B. The objection to the use of some devices C. The annoying noise from the classroom D. A fact of modern life E. Disturbance by someone’s scream in public places F. The website’s quotation 小题1: It's something that most of us find annoying. We're on our way home after a hard day at school and trying to have a quiet chat with a classmate or get in a little reading, when our peace is disturbed by someone screaming into their cell phone: 'I'M ON THE BUS !' 小题2: A survey published last week suggests Americans do not like the impolite use of today's electronic communication gadgets. Besides noisy phone users, sending and receiving e-mails while in company are also as very poor manners, reports MSNBC.com. 小题3: One of the practices that participants in the survey most objected to was the use of phones, iPods and other devices during religious festivals. Some 90 per cent of those surveyed thought this was insensitive and disrespectful. 小题4: The website quotes Dr Genevieve Bell, conductor of the survey and director of Intel's User Experience Group as saying: 'Theses are issues about common sense.' But she believes that the rights and wrongs of the public use of technology are still in the process of formation. 小题5: The survey does suggest, according to MSNBC, that most Amencans accepted that the technologies are a fact of modern life. They had nothing against the use of laptops and cell phones in bathrooms. And an electronic thank-you note was just as acceptable as a handwritten one.
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【判断题】DPTR、PC都是16位的寄存器,所以它们都是在内部RAM中的某两个特殊功能寄存器拼合而成的。
A.
正确
B.
错误
【多选题】关于sed描述正确的是()。
A.
sed是Linux系统中的流编辑器
B.
sed是UNIX系统中的流编辑器
C.
sed网络文件系统的类型
D.
利用管道对标准输入/标准输入的数据进行编辑和组合
E.
sed是NFS的应用程序
【判断题】含同数碳原子的烯烃异构体中,与烯键碳原子直接相连的烷基数目多的较稳定。
A.
正确
B.
错误
【简答题】8086和80286都有4个段寄存器CS、DS、SZ、ES,它们都是【 】位的寄存器,分别是代码段寄存器、数据段寄存器、堆栈段寄存器、附加段寄存器。它们用于内存寻址时, 20位的物理地址是由段寄存器左移4位和16位的偏移量相加而成的。
【单选题】下列关于烷烃与烯烃相比较的叙述中,不正确的是 [     ]
A.
所含元素的种类相同,通式不同
B.
均为链烃,烯烃中含碳碳双键,烷烃中不含碳碳双键
C.
烯烃分子中的碳原子数≥2,烷烃分子中的碳原子数≥1
D.
碳原子数相同的烯烃和烷烃互为同分异构体
【简答题】下图是合成某种聚酯纤维H的流程图: 已知:A、D为烃,质谱图表明G的相对分子质量为166,其中含碳57.8%,含氢3.6%,其余为氧;G能与NaHCO 3 溶液反应且含有苯环;核磁共振氢谱表明E、G分子中均有两种类型的氢原子,且E分子中两种类型的氢原子的个数比为1:1。 (1)①、⑤的反应类型依次为 、 ; (2)B的名称为: ;F的结构简式为: ; (3)写出下列化学方程式: ② ③ ⑥ (4)...
【简答题】根据①碳原子的电子层结构和每两个原子之间方能形成共用电子对而成为共价键;②烃分子中,每减少两个氢原子会减少两根碳氢键而增加一根碳碳键;③把一对共用电子对作为一根键,碳碳双键则为两根键……,苯环用凯库勒式作讨论,碳原子数用n表示。 (1)已知碳的一种同素异形体富勒烯C 60 。有六十个碳原子构成,则该物质分子有共用电子对数为 。 (2)那么烷烃C n H 2n+2 中含碳碳键 根,含共价键总数为...
【判断题】DPTR、PC都是16位的寄存器,所以它们都是在内RAM中的某两个特殊功能寄存器拼合而成的。
A.
正确
B.
错误
【判断题】DPTR、PC都是16位的寄存器,所以它们都是在内RAM中的某两个特殊功能寄存器拼合而成的。
A.
正确
B.
错误
【简答题】8086和80286都有4个段寄存器CS,DS,SS和ES,它们都是______位的,分别是______段寄存器、______段寄存器、______段寄存器和______段寄存器。它们用于内存寻址时,20位的物理地址是由段寄存器内容左移______位和16位的偏移地址______而成。
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