问题 实验题

我是人体内一个长得像小蝌蚪的细胞,我和上亿个同伴竞争,穿过重重阻碍终于在一个狭窄的管道里与卵细胞相遇并结合成一个新的细胞,我们开始分裂,产生更多的细胞,最终在一个宽敞的房子里住下来,开始发育……请回答:

⑴“我”指的是           ,产生“我”的器官是          

⑵“狭窄的管道”指的是         ,结合成“新的细胞”的过程叫做             

⑶“宽敞的房子”指的是母体的              

⑷宝宝在发育过程中,通过                  从母体获得营养物质和氧气。

答案

(1)精子   睾丸 (2)输卵管   受精  (3)子宫   (4)胎盘   脐带

题目分析:人的生殖包括受精和胚胎发育过程。睾丸产生的精子和卵巢产生的卵细胞都是生殖细胞。精子外形像蝌蚪,头大,尾长,能够游动。长约0.06毫米,用显微镜能看到。因此,“我”是精子,是由睾丸产生的。含精子的精液进入 * * 后,精子缓慢地通过子宫,在输卵管内与卵细胞相遇,有一个精子进入卵细胞,与卵细胞相融合,形成受精卵;故“狭窄的管道”是输卵管,结合的过程称为受精。受精卵不断进行分裂,逐渐发育成胚泡;胚泡缓慢地移动到子宫中,最终植入子宫内膜;胚泡中的细胞继续分裂和分化,逐渐发育成胚胎,并于怀孕后8周左右发育成胎儿,胎儿已具备人的形态;胎儿生活在子宫内半透明的羊水中,通过胎盘、脐带与母体进行物质交换;故“宽敞的房子”是指子宫。怀孕到38周左右,胎儿发育成熟,成熟的胎儿和胎盘一起从母体的 * * 排出。

改错题

第五部分:写作(共两节,满分35分)

第四节:短文改错(共10小题;每小题1分,满分10分)

此题要求改正所给短文的错误。对标有题号的每一行做出判断:如无错误,在该行右边横线上划一个勾(√);如有错误(每行只有一个错误),则按下列情况改正:该行多一词:把多余的词用斜线(\)划掉,在该行右边横线上写出该词,并也用斜线划掉。

该行缺一个词:在缺词处加一个漏字符号(∧),在该行右边横线上写出该加的词。

该行错一个词:在错的词下划一横线,在该行右边横线上写出改正后的词。

注意:原行没有错的不要改。

Dear Betty,

Yesterday my roommate invite me to celebrate Thanksgiving           90.        

Day with him in his house. I accepted his invitation, but as you know,     91.        

the social customs in my country is quite different from those here.          92.        

I am a little nervous now. I’m worried about make mistakes and                     93.        

losing faces before many people, too.                                             94.        

Should I bring a gift, such as candy or flowers? But should                 95.        

I arrive at on time or a little late? At the dinner table, how can I                 96.        

know which fork or knife to use? How can I let a family know                97.        

that I’m thankfully for their kindness?                                         98.        

I really find hard to decide, please help me.                         99.        

Yours,

Knowing Nothing

单项选择题

Rarely do major diseases have a single cause. They are usually the result of a complex interaction between many factors, including genetic, environmental and lifestyle components. Many media reports, however, can tead us to believe that if we gave up something that we might otherwise enjoy, we could completely escape that particular affliction.

Clearly, this is not the case. Vegetarians die of cancer of the colon (结肠). Teetotallers die of liver complaints, including cirrhosis (硬化). People who never go out in the sun contract skin melanomas (黑素瘤). Always, there are other factors at work than the single element being examined in a scientific study.

Quite often the alleged benefits of a particular nutritional element are the result not so much of the element itself but of the lifestyle and general diet of the people who consume it most. People who eat lots of "healthy" foods, including fiber, carrots, broccoli etc. , also tend to drink less alcohol, take more exercise, avoid too many fatty foods and smoke less. Only when a study can rule out all of these other factors and often we do not know what these factors might be can we say that there is a causal link between two things. That is not to say that things like fiber and broccoli have no beneficial effects at all. But those with sedentary lifestyles cannot expect these foods to make them healthy.

There is, however, one thing which increases the likelihood of dying relatively young, even when all of the other factors have been taken into account. It is one of the biggest killers even among those who lead lifestyles which, by any criteria, are clearly healthy ones. This single, incontrovertible risk factor is that of being poor. Recent report from the Cancer Research Campaign suggested that 12 700 deaths could have been avoided between 1986 and 1990 if inequalities in cancer care did not exist in England and Wales. Comparing cancer survival rates, the study found that England and Wales fared unfavorably with Europe and the US, but the most affluent regions of these two countries exhibited similar figures to the European average.

In an attempt to counter this disparity the government has announced plans for the provision of Health Action Zones which seek to encourage greater cooperation between health and social services, targeting both rural and inner city areas. The emphasis of this new scheme however appears to focus on inadequacies within health education in these areas, rather than attacking the broader issues of social inequality.

Cancer survival rates found in the study were lower in Wales than in the US because()

A. people in Wales eat more unhealthy food than people in the US

B. people in Wales are poorer than people in the US

C. people in Wales are richer than people in the US

D. cancers in Wales are caused by more complex factors than those in the US