问题 单项选择题

随着年龄的增长,人体对卡路里的日需求量逐渐减少,而对维生素的需求却有日益增多的趋势。因此,为了摄取足够的维生素,老年人应当服用一些补充维生素的保健品,或者应当注意比年轻时食用更多的含有维生素的食物。 为了对上述断定做出评价,回答以下哪个问题至关重要

A.对老年人来说,人体对卡路里需求量的减少幅度,是否小于对维生素需求量的增加幅度

B.保健品中的维生素,是否比日常食品中的维生素更易被人体吸收

C.缺乏维生素所造成的后果,对老年人是否比对年轻人更严重

D.一般地说,年轻人的日常食物中的维生素含量,是否较多地超过人体的实际需要

答案

参考答案:D

解析:题干的议论要成立,需要满足一个条件,即年轻人的日常食物中的维生素含量,并非较多地超过人体的实际需要,否则,如果年轻人的日常食物中的维生素含量,实际上较多地超过人体的实际需要,那么,老年人只要维持年轻时的日常食物就可以了,无须服用一些补充维生素的保健品,或者比年轻时食用更多的含有维生素的食物,因为年轻时的日常食物中超过实际需要的维生素,正好可以用来补充老年人增长的需要,这样题干的议论就不9B成立。D项的问题涉及的正是这个条件,因此对于评判题干至关重要。其余各项中,A和C项与评判题干无关,B项与评判题干有关,但其重要性不如 D项。

阅读理解

阅读理解。

      He lived his whole life as a poor man. His art and talent were recognized by almost no one. He

suffered from a mental illness that led him to cut off part of his left ear in 1888 and to shoot himself two

years later. But after his death, he achieved world fame. Today, Dutch artist Van Gogh is recognized as

one of the leading artists of all time.

     Now, 150 years after his birth on March 30, 1853, Zundert, the town of his birth, has made 2003

"The Van Gogh Year" in his honor. And the Van Gogh Museum in Amsterdam, home to the biggest

collection of his masterpiece, is marking the anniversary with exhibitions throughout the year. The

museum draws around 1.3 million visitors every year. Some people enjoy the art and then learn about

his life. Others are interested in his life, which then helps them understand his art.

     Van Gogh was the son of the minister. He left school when he was just 15. By the age of 27, he

had already tried many jobs including an art gallery salesman and a French teacher. Finally in 1880, he

decided to begin his studies in art.

     Van Gogh is famed for his ability to put his own emotion into his paintings and show his feelings

about a scene. His style is marked by short, broad brush strokes (绘画笔法). "Instead of trying to

reproduce exactly what I have before my eyes, I use color more freely, in order to express myself more

forcefully," he wrote in a letter to his brother in 1888.

     Van Gogh sold only one painting during his short life. He relied heavily on support from his brother,

an art dealer who lived in Paris. But now his works are sold for millions of dollars. His portrait of Dr.

Gacher sold for $89.5 million in 1990. It is the highest price ever paid for a painting. "I think his

paintings are powerful and the brilliant color in them are attractive to people," said a Van Gogh's fan.

1. All through his life Van Gogh _____.

A. depended on his brother

B. worked hard on art studies

C. was not recognized by people

D. expressed himself in paintings

2. Van Gogh killed himself because of _____.

A. the poor life

B. his illness

C. his pain from left ear

D. the objections from the artists of his time

3. One of the characteristics of Van Gogh's paintings is _____.

A. the likeness between his paintings and the reality

B. the short time for him to complete a painting

C. the various styles mixed together

D. the special strokes he made

多项选择题