在深度为5的满二叉树中,叶子结点的个数为______。A.32 B.3l C.16

题型:单项选择题

问题:

在深度为5的满二叉树中,叶子结点的个数为______。

A.32

B.3l

C.16

D.15

考点:计算机等级考试公共基础知识二级公共基础知识
题型:单项选择题

来源于间叶组织的肿瘤是()

A.癌

B.肉瘤

C.母细胞瘤

D.类癌

E.临界肿瘤

题型:单项选择题

上半夜的阴阳属性是()。

A.阳中之阳

B.阳中之阴

C.阴中之阳

D.阴中之阴

E.上半夜属阴

题型:单项选择题

Jane Austen, a famous English writer, was born in Steventon, Hampshire, on December 16, 1775, and died on July 18,1817. She began writing early in life, although the prejudices(偏见)of her times forced her to have her books published anonymously.(匿名).

  But Jane Austen is perhaps the best known and best loved of Bath’s many famous local people and visitors. She paid two long visits during the last five years of the eighteenth century and from 1801 to 1806, Bath was her home. Her deep knowledge of the city is fully seen in two of her novels, Northanger Addey and Persuasion, which are largely set in Bath. The city is still very much as Jane Austen knew it, keeping its streets and public buildings the well—ordered world that she described so well in her novels. Now the pleasure of learning Jane Austen’s Bath can be enhanced (增强)by visiting the Jane Austen Center in Gay Street. Here, in a Georgian town house in the heart of the city, you can find out more about Bath in Jane Austen’s time and the importance of Bath in her life and work.

  The Center has been set up with the help and guidance of members of the Jane Austen Society. After your visit to the Center, you can look round the attractive shop, which offers a huge collection of Jane Austen related books, cards and many specially designed gifts. Jane Austen quizzes are offered to keep the children busy.

  You can also have walking tours of Jane Austen’s Bath, which is a great way to find out more about Jane Austen and discover the wonderful Georgian city of Bath. The tour lasts about one and a half hours. The experienced guides will take you to the places where Jane lived, walked and shopped.

小题1:Jane Austen paid two long visits to Bath__________ .

A.in her early twenties

B.in her early teens

C.in her late twenties

D.in her late teens小题2:What can we learn about Bath from the passage? .

A.Bath has greatly changed since Jane Austen’s death.

B.The city has changed as much as Jane Austen knew it.

C.Bath remains almost the same as in Jane Austen’s time.

D.No changes have taken place in Bath since Austen’s time.小题3:The author writes this passage in order to _____________.

A.attract readers to visit the city of bath

B.ask readers to buy Austen’s books

C.tell readers about Jane Austen’s experience

D.give a brief introduction to the Jane Austen Society小题4:After you have visited the Center, you can get the following things EXCEPT________.

A.books about Austen and her family life

B.cards and gifts that have something to do with Austen

C.the quizzes written by Austen to keep the children busy

D.the books written by the other writers about Austen

题型:单项选择题

某种生物核酸中的碱基组成是嘌呤碱基占52%,嘧啶碱基占48%。此生物不可能是()

A.烟草

B.小麦

C.烟草花叶病毒

D.噬菌体

题型:单项选择题

关于诊断仪使用说法正确的是()

A.连接诊断仪之前要打开点火开关

B.连接诊断仪之前必须关闭点火开关

C.没有先后顺序

D.A、B的说法都不正确

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