操作层系统主要负责()等,支持个人或团体用户的常规业务操作。
A.基层数据采集
B.完成日常的计划
C.管理监控
D.日常业务处理
E.管理监测
参考答案:A, D, E
根据首字母或汉语提示完成下列句子(每空一词,每题一分,共10分)
小题1:You should try your best to _______ ________ _______ (改掉) such bad habits.
小题2:We simply cannot t_______ cheating in exams. (忍受)
小题3:E_________,I slid into bed and fell fast asleep.(感到累极了)
小题4:Don’t a______ the tiger! It is too dangerous.
小题5:The little girl was so_____ in reading that she forgot to have dinner.(专心于,专注于)
小题6:He found that _____ water carried the virus. (受到污染的)
小题7:When people____ ______ (提及,谈及)England, you find Wales included as well.
小题8:On my way to the station my car ________ ________ (抛锚,出故障)
小题9:My first _____ _____ our school is small.( 对…印象)
小题10:China _________ ________ more than thirty provinces .(由组成,构成)
目前人类已发现的非金属元素除稀有气体外共有16种。下列对这16种非金属元素的相关判断不正确的是( )
①都是主族元素,最外层电子数都大于4; ②单质在化学反应中都只能作氧化剂;
③氢化物在常温下都是气体,所以又叫气态氢化物;④氧化物常温下都可以与水反应生成酸
A.①②
B.①③
C.③④
D.①②③④