命题“若x，y都是偶数，则x+y也是偶数”的否命题是（ ） A．若x，y都是偶数

鼻咽癌逐渐发展可分为（）

A.菜花型

B.结节型

C.溃疡型

D.粘膜下型

E.息肉型

阅读理解。

     Treasure hunts (寻宝) have excited people's imagination for hundreds of years both in real life and

in books such as Robert Louis Stevenson's Treasure Island. Kit Williams, a modern writer, had the idea

of combining the real excitement of a treasure hunt with clues (线索) found in a book when he wrote a

children's story, Masquerade, in 1979. The book was about a hare,and a month before it came out

Williams buried a gold hare in a park in Bedfordshire. The book contained a large number of clues to help

readers find the hare, but Williams put in a lot of "red herrings", or false clues, to mislead them.

     Ken Roberts, the man who found the hare, had been looking for it for nearly two years. Although he

had been searching in the wrong area most of the time, he found it by logic (逻辑), not by luck.His

success came from the fact that he had gained an important clue at the start. He had realized that the

words: "One of Six to Eight" under the first picture in the book connected the hare in some way to

Katherine of Aragon, the first of Henry VIII's six wives. Even here, however,Williams had succeeded in

misleading him. Ken knew that Katherine of Aragon had died at Kimbolton in Cambridgeshire in 1536 and

thought that Williams had buried the hare there. He had been digging there for over a year before a new

idea occurred to him.He found out that Kit Williams had spent his childhood near Ampthill, in Befordshire,

and thought that he must have buried the hare in a place he knew well, but he still could not see the

connection with Katherine of Aragon,until one day he came across two stone crosses in Ampthill Park

and learnt that they had been built in her honor in 1773.

     Even then his search had not come to an end. It was only after he had spent several nights digging

around the cross that he decided to write to Kit Williams to find out if he was wasting his time there.

Williams encouraged him continue, and on February 24 th 1982, he found the treasure. It was worth

￡3000 in the beginning, but the excitement it had caused since its burial made it much more valuable.

1. The underlined word "them"(paragraph1) refers to _____. 

A. red herrings

B. treasure hunts

C. Henry VIII's six wives

D. readers of Masquerade

2. What is the most important clue in the story to help Ken Roberts find the hare?

A. Two stone crosses in Ampthill

B. Stevenson's Treasure Island

C. Katherine of Aragon

D. Williams' hometown

3. The stone crosses in Ampthill were built _____.

A. to tell about what happened in 1773

B. to show respect for Henry VIII's first wife

C. to serve as a roadsign in Ampthill Park

D. to inform people where the gold hare was

4. Which of the following describes Roberts' logic in searching for the hare?

a. Henry VIII's six wives

b. Katherine's burial place at Kimbolton

c. Williams' childhood in Ampthill

d. Katherine of Aragon e.stone crosses in Ampthill Park

A. a-b-c-e-d

B. d-b-c-e-a

C. a-d-b-c-e

D. b-a-e-c-d

5. What is the subject discussed in the text?

A. An exciting historical event

B. A modern treasure hunt

C. The attraction of Masquerade

D. The importance of logical thinking

常见的园艺加工产品有（）、腌渍品、糖制品和（）等。

对于语句cin＞＞x；中的各个组成部分，下列叙述中错误的是

A．“cin”是一个输出流对象

B．“；”的作用是表示语句结束

C．“x”是一个变量

D．“＞＞”称作提取运算符

四边形的四条边a、b、c、d，那么四边形的面积s等于a加c乘以b加d除以4。”这是数学家（）发现的。

A.帕斯卡

B.费马

C.成甑鸾

D.法布尔