问题 解答题

如图是人体部分血液循环示意图.a、b、c、d是血液循环的动力器官的四腔.e、f、g等器官中,e能分泌不含消化酶的消化液,有利脂肪的消化.f内有消化脂肪、淀粉和蛋白质的酶.g的外形似蚕豆,是主要的排泄器官.请根据所给信息回答下列问题

(1)填写有关字母和标号代表的结构名称[d]______⑤______.

(2)②内所流血液的性质是______

A.含养分多的动脉血     B.含养分多的静脉血

C.含养分少的动脉       D.含养分少的静脉血

(3)比较(①,②,④,⑤,[______]中血液里所含尿素浓度最低.

(4)[h]是其所在系统的主要器官,那么,[h]的功能是______场所.

答案

图中a是右心房,b是左心房,c是右心室,d是左心室.e能分泌不含消化酶的消化液,有利于脂肪的消化,所以是肝脏;f内有消化脂肪、淀粉和蛋白质的酶,所以是小肠;g的外形似蚕豆,是主要的排泄器官,所以是肾脏;h是肺,是进行气体交换的主要场所.

(1)⑤是流经e后,连接a右心房的血管,所以应该是静脉,又因为e是肝脏,所以⑤是肝静脉;d是左心室.

(2)②是流经f小肠后,连接a右心房的血管,所以应该是静脉,在流经f后,血液中的氧气进入组织细胞,养料进入血液,所以②内所流血液的性质是含养分多的静脉血.

(3)g是肾脏,当血液流经g后,在肾小球的过滤和肾小管的重吸收作用下,尿素进入排泄器官,通过 * * 排出体外,所以流经g肾脏的血液,即④中的血液中尿素含量最低.

(4)h是肺,是进行气体交换的主要场所.

故答案为:(1)左心室;⑤肝静脉.

(2)B.

(3)④.

(4)气体交换.

阅读理解

The World Health Organization says there has been a sharp increase in the number of over-weight children in developing countries. In African countries, the WHO says the number of over-weight or obese children is twice as high as it was 20 years ago. Around the world, about 43 million children under the age of five were overweight in 2013.

Overweight and obese children are more likely to become overweight and obese adults. The condition can generate serious health problems like heart diseases.

Francesco Branca is the director of the WHO Department of Nutrition for Health and Development. He says urban lifestyle makes people eat processed food more often ,which has a high sugar ,fat and salt content. He also says people are gaining weight because of their lack of activities. They travel in cars or other vehicles more than on foot.

The WHO experts say to lower obesity rates is especially complex in countries that also deal with high rates of infectious(感染性的) diseases.

The WHO has some basic solutions for individuals and countries. The organization says you should lower your intake of fat, sugar, salt and processed food and eat more fruits,' vegetables and increase physical activity. The WHO says these actions are especially important for children.

And WHO expert Branca says mothers should breastfeed their babies for at least the first six months of life, if possible. More importantly, governments should consider providing vitamins for children and educational campaigns about problems linked to obesity would also help. In his view, government policies should deal with how food is marketed to children and food producers must balance quality and taste with the dangers of sugar, fat and salt. "Reducing the number of overweight children will not be easy. The goal is difficult to meet even in wealthy countries. " he adds.

小题1:What is the main idea of Paragraph l?

A.Children in developing countries generally weigh too much.

B.Overweight children in developing countries have increased greatly.

C.The number of overweight children in the world has doubled.

D.The World Health Organization has increased greatly.小题2:According to Branca , people are becoming overweight because of their changes in _______

A.lifestyles

B.transportation

C.physical condition

D.school educational .小题3:Which of the following word can best replace the underlined word in Paragraph 2?

A.cure

B.prevent

C.worsen

D.cause小题4:According to WHO, which of the following is true?

A.Poor nutrition is often related to children obesity.

B.To lower infectious disease rates is more complex than to lower obesity rates.

C.Eating less sugar and more vegetables helps lower obesity rates.

D.Increasing physical activity is most effective to lower obesity rates.小题5:What can we learn from the last Paragraph?

A.Babies breastfed aren't likely to become overweight.

B.Governments should play a necessary role in fighting obesity.

C.Food producers should be stopped from marketing, food to children.

D.The number of overweight children decreases easily in wealthy countries.

单项选择题