问题 解答题

如图是消化系统的模式图,请据图回答:

(1)口腔中有人体最坚硬的器官______.______是呼吸道和消化道的共同通道.

(2)人体最大的消化腺是[______]______,它分泌的消化液是______;______位于消化道外,分泌的消化液能够消化淀粉、蛋白质和脂肪.

(3)蛋白质消化起始于结构[______],脂肪的消化起始于[______].

(4)消化道中最膨大的部分是______,它除了能消化______之外,还能吸收水和______.

(5)消化道中最长的单位是[______]______.粪便形成的部位是[______]______.

答案

(1)人体最坚硬的器官是牙齿,能够咀嚼食物.②咽就是呼吸的通道也是消化的通道.

(2)人体最大的消化腺是③肝脏,能够分泌胆汁,储存在④胆囊中,胆汁中不含消化酶.⑨胰腺分泌的胰液中含有多种消化酶,能够消化淀粉、蛋白质和脂肪.

(3)蛋白质在10胃中开始被消化,在胃蛋白酶的作用下被初步消化,然后进入⑦小肠,在小肠中肠液和胰液中酶的作用下变成氨基酸;

脂肪只能在⑦小肠中被消化,在小肠内,在肝脏分泌的胆汁的作用下,被乳化为脂肪微粒,然后再在小肠中肠液和胰液中酶的作用下变成甘油和脂肪酸.

(4)10胃是消化道中最膨大的部位,内表面有胃腺,可以分泌胃液,胃液中含有蛋白酶,能够初步消化蛋白质.胃能够吸收水、无机盐和少量的酒精.

(5)⑦小肠是消化道中最长一段,是消化和吸收的主要器官.⑧大肠是形成粪便的器官.

故答案为:(1)牙齿;咽;

(2)③肝脏;胆汁;⑨胰腺;

(3)10;⑦;

(4)胃;蛋白质;无机盐和少量酒精;

(5)⑦小肠;⑧大肠.

单项选择题
阅读理解

阅读理解。

     "Mum, what does it mean when someone tells you that they have a skeleton (骨骼) in the closet (衣橱)?"

Jessica asked. "A skeleton in the closet?" her mother paused thoughtfully. "Well, it's something that you would

rather not have anyone else know about. For example, if in the past, someone in Dad's family had been arrested

for stealing a horse, it would be a skeleton in his family's closet. He really wouldn't want any neighbor to know

about it."

     "Why pick on my family?" Jessica's father said with anger. "Your family history isn't so good, you know.

Wasn't your great-great-grandfather a prisoner who was transported to Australia for his crimes?" "Yes, but

people these days say that you are not a real Australian unless your ancestors arrived as prisoners." "Gosh, sorry

I asked. I think I understand now," Jessica cut iin before things grew worse.

     After dinner, the house was very quiet. Jessica's parents were still quite angry with each other. Her mother

was ironing clothes and every now and then she glared at her husband, who hid behind his newspaper pretending

to read. When she finished, she gathered the freshly pressed clothes in her arms and walked to Jessica's closet.

Just as she opened the door and reached in to hang a skirt, a bony arm stuck out from the dark depths and a

bundle of white bones fell to the floor. Jessica's mother sank in a faint (晕倒), waking only when Jessica put a

cold, wet cloth on her forehead. She looked up to see the worried faces of her husband and daughter.

     "What happened? Where am I?" she asked. "You just destroyed the school's skeleton, Mum," explained

Jessica. "I brought it home to help me with my health project. I meant to tell you, but it seemed that as soon as

I mentioned skeletons and closets, it caused a problem between you and Dad." Jessica looked in amazement as

her parents began to laugh madly. "They're both crazy," she thought.

1. According to Jessica's mother, "a skeleton in the close" means _____.

A. a family honor

B. a family secret

C. a family story

D. a family treasure

2. What can we learn about some Australians' ancestors form Paragraph 2?

A. They were brought to Australia as prisoners.

B. They were the earliest people living in Australia.

C. They were involved in some crimes in Australia.

D. They were not regarded as criminals in their days.

3. Jessica's mother fell down into a faint because she was _____.

A. knocked

B. frightened

C. injured

D. surprised

4. Jessica's mother fell down into a faint because she was _____.

A. knocked

B. frightened

C. injured

D. surprised

5. Jessica's parents laughed madly at the end of the story probably because _____.

A. they were crazy

B. they were over excited

C. they realized their misunderstanding

D. they both thought they had won the quarrel