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【单选题】
下列说法正确的是( )
A.
整数规划问题的最优值优于其相应的线性规划问题的最优值
B.
用割平面法求解整数规划问题,构造的割平面有可能切去一些不属于最优解的整数解
C.
用分支定界法求解一个极大化的整数规划时,当得到多于一个可行解时,通常可其中一个作为下界,再进行比较剪支
D.
分支定界法在处理整数规划问题时,借用线性规划单纯形法的基本思想,在求相应的线性规划解的同时,逐步加入对各变量的整数要求限制,从而把原整数规划问题通过分支迭代求出最优解
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举一反三
【单选题】Which of the following descriptions is incorrect about Franklin’s teenage years in The Autobiography ?
A.
He works for his brother who is in the printing industry.
B.
There are frequent disagreements between Franklin and his brother.
C.
He sneaks onto a ship and heads for California.
D.
The printer William Bradford is unable to employ him.
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【单选题】关于硫酸镁导泻作用的叙述,哪项是错误的
A.
口服后能使肠腔内渗透压升高而阻止水分吸收
B.
导泻作用强大
C.
为了增强导泻作用，用药后嘱病人多饮水
D.
常用于药物中毒，尤其是中枢抑制药中毒昏迷时的导泻
E.
因可致盆腔充血，故孕妇、月经期妇女禁用
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【单选题】In his teenage years, Burt Rutan( )
A.
was hooked to the idea of commercial space travel.
B.
was fascinated by the design of the White Knight.
C.
was busy making model planes and winning trophies.
D.
was engaged in flying his own aircraft.
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【简答题】用列举法表示下列集合: (1) 大于-4且小于12的全体偶数; (2) 方程 -5x-6=0的解集.
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【单选题】Where did he spend most of his teenage years?
A.
In Mongolia.
B.
In the Arab world.
C.
In his hometown.
D.
In some other regions.
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【多选题】消化性溃疡的发病原因包括
A.
Hp感染
B.
前列腺素
C.
胃酸和胃蛋白酶
D.
NSAID
E.
胆汁返流
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【简答题】用列举法表示下列集合: (1) 大于-4且小于12的全体偶数; (2) 方程x一6=7的解.
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相关题目：
【单选题】Which of the following descriptions is incorrect about Franklin’s teenage years in The Autobiography ?
A.
He works for his brother who is in the printing industry.
B.
There are frequent disagreements between Franklin and his brother.
C.
He sneaks onto a ship and heads for California.
D.
The printer William Bradford is unable to employ him.
查看完整题目与答案
【单选题】关于硫酸镁导泻作用的叙述,哪项是错误的
A.
口服后能使肠腔内渗透压升高而阻止水分吸收
B.
导泻作用强大
C.
为了增强导泻作用，用药后嘱病人多饮水
D.
常用于药物中毒，尤其是中枢抑制药中毒昏迷时的导泻
E.
因可致盆腔充血，故孕妇、月经期妇女禁用
查看完整题目与答案
【单选题】In his teenage years, Burt Rutan( )
A.
was hooked to the idea of commercial space travel.
B.
was fascinated by the design of the White Knight.
C.
was busy making model planes and winning trophies.
D.
was engaged in flying his own aircraft.
查看完整题目与答案
【简答题】用列举法表示下列集合: (1) 大于-4且小于12的全体偶数; (2) 方程 -5x-6=0的解集.
查看完整题目与答案
【单选题】Where did he spend most of his teenage years?
A.
In Mongolia.
B.
In the Arab world.
C.
In his hometown.
D.
In some other regions.
查看完整题目与答案
【多选题】消化性溃疡的发病原因包括
A.
Hp感染
B.
前列腺素
C.
胃酸和胃蛋白酶
D.
NSAID
E.
胆汁返流
查看完整题目与答案
【简答题】用列举法表示下列集合: (1) 大于-4且小于12的全体偶数; (2) 方程x一6=7的解.
查看完整题目与答案
【简答题】女性病人，58岁。因右下腹隐痛不适伴黏液血便半年入院。体格检查：消瘦，贫血貌。腹软，右下腹扪及约5.5cm×5cm包块，边界不清，质硬固定，轻压痛，无反跳痛。肠镜检查发现盲肠部溃疡型肿物，病理活检结果为高分化腺癌。试述该病例的治疗原则，如能行肿瘤根治术，试述其切除范围。
查看完整题目与答案
【简答题】题干 1.给下列加点字注音: 果蠃( ) 螟蛉( ) 螫针( ) 绝祀( ) 嘉猷( )窠里( ) 孵化( ) 棘手( ) 麻痹( ) 中枢( ) 中( )风 2.鲁迅,原名 ,字 ,浙江绍兴人,中国现代作家、思想家、革命家,中国新文化革命的主将主要作品有...
查看完整题目与答案
【简答题】OPENINGS AND PREVIEWS Animals Out of Paper Yolo! Productions and the Great Griffon present the play by Rajiv Joseph, in which an origami ( 折纸术 ) artist invites a age talent and his teacher into he...
查看完整题目与答案