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【单选题】
实时操作系统必须在()内处理来自外部的事件A.
一个机器周期
B.
被控对象规定时间
C.
周转时间
D.
时间片
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举一反三
【单选题】Mr Brown has three children, one of whom is a child of six, twins of twelve.
A.
another
B.
the other
C.
the others
D.
other
【单选题】Martha has six children and two part-time job. She is under a lot of _____.
A.
energy
B.
pressure
C.
stress
【单选题】A five-year-old child knows over six thousand words he or she has also learned more than one thousand rules of grammar. （单选题）
A.
A five-year-old child knows over six thousand words, he or she has also learned more than one thousand rules of grammar.
B.
A five-year-old child knows over six thousand words. He or she, has also learned more than one thousand rules of grammar.
C.
A five-year-old child knows over six thousand words. He, or she has also learned more than one thousand rules of grammar.
D.
A five-year-old child knows over six thousand words, and he or she has also learned more than one thousand rules of grammar.
【单选题】2003年7月,德化县黄某从浙江购入仔猪316头,饲养到9月有175头猪表现为食欲不振,下痢或腹泻与便秘交替发生,个别表现为腹胀腹痛等症状,严重的出现贫血消瘦,发育不良,死亡2头。猪舍均建在池塘边,粪便直接排到池塘内喂鱼,池塘里还种植了大量的水葫芦等水生植物。据了解,畜主未对猪只进行驱虫,还经常打捞一些水葫芦生喂猪,以代替部分青绿饲料。该病最有可能是
A.
姜片形吸虫病
B.
日本血吸虫病
C.
阔盘吸虫病
D.
肝片吸虫病
E.
前后盘吸虫病
【单选题】Mr. Oven has three children, one of whom is a child of six, ___ twins of twelve.
A.
another
B.
other
C.
the others
D.
others
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