问题 选择题

食用豆腐能获得人体所需要的多种氨基酸,其中含量最多的是亮氨酸(化学式:C6H13NO2)。下列有关亮氨酸的说法错误的是                            (    )

A.由四种元素组成

B.亮氨酸中碳元素的质量分数最高

C.一个分子由25个原子构成

D.亮氨酸是有机化合物

答案

答案:C

题目分析:A 根据化学式可得亮氨酸由四种元素组成;B 亮氨酸中碳元素的相对原子质量最大,所以亮氨酸中碳元素的质量分数最高;C一个分子由22个原子构成;D 亮氨酸是含碳元素的化合物,为有机化合物。

点评:化学式的意义在最近几年的中考中出现较多,难点在于审题上,注意细心读题,不要想当然。

阅读理解

第三部分阅读理解(满分40分)

第一节阅读选择(共10小题;每小题2分,满分20分)

A

A Father’s day is a day set aside for honouring fathers in church services and in

the home. It’s celebrated in the U.S. in the third Sunday of June. This idea was begun by Mrs John Bruces Dodd, who in 1909 persuaded an organization in Washington to

salute fathers with special church services. The idea was officially agreed to by President Woodrow Wilson in 1916. In 1924, President Calvin Coolidge suggested national celebration of the day to form closer relations between fathers and their children, and to impress upon fathers the full measure of their duties. The red or white rose is recognized as the official Father’s Day flower.

56. Father’s Day, at first, meant ______.

A. to honor fathers in church services and in the home

B. to win honor for fathers in church services

C. to do honour to fathers at home

D. to warn the fathers of their duties

57. Father’s Day was first celebrated by _____.

A. the French      B. the British      C. the German       D. the American

58. The first president who agreed to Father’s Day was _____.

A. Woodrow Wilson     B. Calvin Coolidge

C. George Washington   D. Abraham Lincoln

59. The president wanted Father’s Day to be a day on which _____.

A. people remembered their fathers

B. the relations between fathers and their children became closer

C. fathers must remember that they should be good fathers

D. both B and C

60. According to the passage, this idea was begun by______.

A. Woodrow Wilson      B. Calvin Coolidge

C. George Washington    D. Mrs. John Bruces Dodd

单项选择题