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【单选题】
世界上第一台申请专利的电子计算机ENIAC,其主要逻辑元件是由( )组成的,属于第一代计算机范畴。
A.
晶体管
B.
集成电路
C.
电子管
D.
超大规模集成电路
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参考答案:
举一反三
【单选题】对于化学平衡,以下叙述中不正确的是
A.
化学平衡时,各物质的化学势相等
B.
化学平衡时,系统的热力学性质不随时间变化
C.
化学平衡态,是化学反应在该条件下的限度
D.
其它选项均不正确
【单选题】如图所示简支梁,载荷q和跨度l一定,要减小其挠度,最有效的措施是:
A.
增大截面面积,以增加惯性矩的值
B.
不增大截面面积,而改用惯性矩较大的“工”字形截面
C.
用弹性模量较大的材料
D.
在梁的中间增加基座
【单选题】The key factor that guides the four strategies is to ______.
A.
use the four strategies flexibly in different situations
B.
strengthen the government's control in each sector
C.
reflect the cost of technology as much as possible in application
D.
reduce the cost of technology to protect consumers' interests
【单选题】An access list was written with the four statements shown in the graphic.Which single access list statement will combine all four of these statements into a single statement that will have exactly the...
A.
access-list10 permit 172.29.16.00.0.0.255
B.
access-list10 permit 172.29.16.00.0.1.255
C.
access-list10 permit 172.29.16.00.0.3.255
D.
access-list10 permit 172.29.16.00.0.15.255
E.
access-list10 permit 172.29.0.00.0.255.255
【单选题】下列关于计算机病毒的叙述中,正确的选项是( )。
A.
计算机病毒是由于软件片表面不清洁而造成的
B.
计算机病毒是通过电力网进行传播的
C.
计算机病毒只感染·exe或·Com文件
D.
计算机病毒可以通过读写软件、光盘或Internet网络进行传播
【单选题】动力滑台需要实现快进_一工进_二工进_快退,其液压系统采用变量泵还是定量泵
A.
定量泵
B.
变量泵
C.
齿轮泵
【简答题】List four bathers to interpersonal communication. (列出人际交流的四种障碍。)
【简答题】2 I was reminded of this sad fact at a party when a fellow guest asked me the subject of a book I was planning to write. What is the “sad fact”? What does this choice of word tell us about the writer’...
【单选题】Observe the following access list configuration: An access list was written with the four statements shown in the graphic. Which single access list statement will combine all four of these statements ...
A.
access-list 10 permit 172.29.16.0 0.0.0.255
B.
access-list 10 permit 172.29.16.0 0.0.1.255
C.
access-list 10 permit 172.29.16.0 0.0.3.255
D.
access-list 10 permit 172.29.16.0 0.0.15.255
【单选题】以下选项中叙述正确的是
A.
结构化程序的三种基本结构是循环结构、选择结构、顺序结构
B.
C语言源程序不编译也能直接运行
C.
使用N-S流程图不能描述复杂算法
D.
计算机能够直接运行C语言源程序,不必进行任何转换
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