问题 选择题

“关爱生命,拥抱健康”是永恒的主题.下列有关叙述不正确的是(  )

A.食品添加剂和保健药剂能适当补充一些体内缺乏的元素,可以适当食用

B.食用牡蛎等含锌海产品防治因缺锌引起的食欲不振、发育不良

C.铁、锌、钙等微量元素能调节新陈代谢,维持身体健康

D.用甲醛浸泡水产品,会破坏蛋白质的结构,使其变质,应禁止使用

答案

A、人体所需的元素从食物中摄取不足时,可通过食品添加剂和保健药剂以补充.如制成补钙、补锌的保健药剂或制成加碘食盐等,来增加对这些元素的摄入量,故A说法正确;

B、缺锌会引起食欲不振,生长迟缓,食用牡蛎等富含锌海产品防治因缺锌引起的食欲不振、发育不良,故B说法正确;

C、铁、锌等微量元素能调节新陈代谢,维持身体健康;但钙不是微量元素,属于常量元素,故C说法不正确;

D、甲醛有毒,能使蛋白质的结构被破坏,不仅对人体有害,也会改变主要含蛋白质的食品的品质,应禁止使用;故D说法正确;

故选C.

阅读理解

More than seven hundred years ago, the Prince of Wales had a very big and brave dog called Gelert. One day the Prince wanted to go hunt-ing with his men. He told his dog to stay at home and look after his baby son. The baby was in a wooden cradle, which was like a small bed. When the Prince came back from hunt-ing, Gelert ran out to meet his master. He wagged his tail and jumped up to put his paws on the Prince's chest. Then the Prince saw the blood on Gelert's jaws and head.

"What have you done?" the Prince said. He rushed into his house and looked for his baby son. The cradle was lying on its side on the floor. The clothes were torn and there was blood on them.

"So you have killed my son?" the Prince said angrily. "You unfaithful dog!" He took out his sword and killed the dog. Just as Gelert was dying, he managed to bark. Then the Prince heard a baby call to the dog.

The Prince ran out of the house and saw his son lying on the ground unhurt. Near him was a dead wolf. Then the Prince knew that Gelert had defended the baby and killed the wolf.

The Prince ran back into the house but he was too late. Gelert was dead. The Prince was very sad indeed. Tears ran down his face when he realized 'he had killed his faith-ful friend. The Prince carried the body of his brave dog to the top of a mountain and buried him there. After this, the Prince never smiled again. Every morning at dawn, he walked up the mountain and stood by the dog's grave for a few minutes.

If you go to Mount Snowdon in Wales, people will show you where Gelert is buried. There is a sign by his grave. It reminds peo-ple of a brave and faithful dog.

小题1:

Gelert was the dog of the Prince of ___.

A.Scotland

B.England

C.Ireland

D.Wales小题2:

The Prince told the dog to _____ when he was leaving.

A.watch the door

B.take care of his baby at home

C.welcome his friends

D.stop the strangers小题3:

The dog was very ____ when his master came back from hunting.

A.glad

B.fearful

C.afraid

D.tired小题4:

The Prince never smiled again because __

A.the wolf was killed by Gelert

B.he had buried the dog on the top of mountain

C.he had killed his faithful friend Gelert

D.Gelert had killed his baby son

单项选择题