Section B
Directions: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A, B, C and D.
听力原文: Einstein had a great effect on science and history. An American university president once said that Einstein had invented a new outlook, a new view of the universe. It may be some time before the average mind understands fully the identity of time and space and so on--but even ordinary men understand now the universe is something larger than ever thought before.
By 1914 the young Einstein had gained world fame. He accepted the offer to become a professor at the Prussian Academy of Science in Berlin. He had few duties, little teaching and unlimited chances for study, but soon his peace and quiet were broken by the First World War.
Einstein hated violence. The great pain and suffering of war affected him deeply, and he sat unhappy in his office doing little. He lost interest in his research. Only when peace came in 1918 was he able to get back to work.
In the years following World War I, honors were increasingly given to him. He became the head of the Haiser Wilhelm Institute of Theoretical Physics. In 1921 he won the Nobel Prize, and he was honored in Germany until the rise of Nazism when he was driven from Germany because he was a Jew.
(27)
A.Everyone understands Einstein's theory today.
B.Einstein achieved more than any other scientists in history.
C.The Theory of Relativity can be quickly learned by everyone.
D.Our ideas about the universe are different today because of Einstein.
第2题
设根的层次为1,则有64个结点的完全二叉树的深度为__________。【中南大学2005二、10(2分)】
第4题
设二叉树根结点的层次编号为1,则深度为k的完全二叉树有(31)种。
A.2k
B.2k-1
C.2(k-1)
D.2k
第6题
设二叉树中所有非叶结点的左、右子树都不为空。试证明对此类二叉树满足:
(1)含有n个叶结点的二叉树中共有2n-1个结点。
(2),其中,n为叶结点个数,1.表示第i个叶结点所在的层次(设根结点所在的层次为1).
第7题
设根的层数为0,在高度为h0的严格二叉树(无度为1的结点)中,结点总数n满足(32)。
A.2h+1≤n≤2h-1
B.2h-1≤n≤2h-1
C.2h-1≤n≤2h+1-1
D.2h+1≤n≤2h+1-1
第8题
A.二叉树为满二叉树(即每层的结点数达到最大值)B.二叉树中每个内部结点都有两个孩子C.二叉树中每个内部结点都只有左孩子D.二叉树中每个内部结点都只有右孩子
第9题
(3)按层次次序将一棵有 n 个结点的完全二叉树的所有结点从 1到 n 编号,当 i≤(n-1)/2 时,结点 i 的
右子女的结点编号为___________。
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