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【简答题】
已知一个图的顶点集V和E分别为: V={1,2,3,4,5,6,7}; E={(1,2)3,(1,3)5,(1,4)8,(2,5)10,(2,3)6,(3,4)15,(3,5)12,(3,6)9, (4,6)4,(4,7)20,(5,6)18,(6,7)25}; 按照克鲁斯卡尔算法得到最小生成树,试写出在最小生成依次得到的各条边。
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举一反三
【单选题】According to the passage, a fundamental way to wipe out malaria is to ______
A.
develop new malaria-resistant drugs
B.
produce effective pesticides to kill mosquitoes
C.
change the genetic makeup of mosquitoes
D.
remove people from malaria-infected areas
【单选题】Mosquitoes are only means of ______ of malaria.
A.
transference
B.
transformation
C.
transition
D.
transmission
【单选题】阅读下面的文字,完成 13~15题。 东汉铜奔马用鸟形底座,在艺术上是一种创造。制作者在固定奔马的同时,将底座的实用功能与艺术创造结合起来, ( ) ,增添了作品的艺术效果。实际上,借助部件来实现实用与审美目的的做法在汉代是常见的, 比如著名的长信宫灯将雕塑与灯结合,以宫女的袖管为排烟道的方法也是如此。 塑造一匹马的逼真形象并不太难,然而要将一件静止的物件表现出动感,特别是要表现出日行千里的良马 ...
A.
这一做法大胆而又巧妙
B.
大胆而又巧妙的这一做法
C.
这一做法的大胆而又巧妙
D.
这一大胆而又巧妙的做法
【单选题】Scientists are hoping to eliminate malaria (疟疾) by developing a genetically modified mosquito that cannot transmit the disease. Malaria has long troubled the populations of South America, Africa, and ...
A.
more people have moved to malaria-infected areas
B.
mosquitoes have become resistant to pesticides
C.
genetically modified mosquitoes still transmit the disease
D.
mosquitoes bite as many as 500 million people a year
【单选题】What is not one of the bad effects of malaria?
A.
The malaria parasites will grow and divide in the kidney.
B.
The red blood cells will then be invaded by the parasites which reproduce thousands of times later.
C.
The parasites cause a person' s body temperature to rise.
D.
People with malaria may suffer kidney failure or loss of red blood cells.
【单选题】历史唯物主义的人民主权决定论认为,国家的合法性来自于(C),人民才是真正的(B),是历史发展的( ),国家只是人民权力的外在表现形式。
A.
决定者
B.
国家统治者
C.
人民的认可
D.
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