（翻译）A pictorial display of an organism,s chromosomes in--高校试题库-www.gxtiku.com

2025年4月15日星期二乙巳【蛇】年三月十八

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ID：9406-6810

Wide-ranging research on tooth decay has recently produced some surprising findings. one indicates that cheddar may actually inhibit the tooth-decay process. It seems to have decay-slowing effect on human teeth if it is eaten immediately after sugar. Why cheese should have such an effect is unknown. It is speculated that the food might interfere with the acid that decays teeth or with bacteria that produce the acid. If so, it would be the first common food found to have this useful property. The other suprprising research finding was that heavily sweetened cereals proved about equally potent in causing decay whether they contained eight percent sugar or almost eight times that much.

1. According to the passage, how many of the test results were unexpected?

A. One B. Two C. Three D. Eight

2. According to the passage, what effect does cheddar cheese seem to have?

A. It interferes with the function of teeth.

B. It makes sugar taste sweeter.

C. It decreases the rate at which teeth decay.

D. It helps in the digestion of food.

3. It can be inferred from the passage that the research on the relationship between cheese and tooth.

A. has been discredited

B. will be slowed considerably

C. has been found to be conclusive

D. will be continued

4. Researchers discovered that sweetened cereals were.

A. important nutritionally

B. all surprisingly heavy in sugar

C. more expensive than cheese

D. all equally harmful to teeth

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ID：9406-6837
Insect,s lives are very short and they have many enemies, but they must survive long enough to breed and perpetuate their kind. The less insect like they look, the better their chance of survival. To look “inedible” by resembling or imitating plants, is a deception widely practiced by insects .Mammals rarely use this type of camouflage, but many fishes and invertebrates do. The stick caterpillar is well named. It is hardly distinguishable from a brown or green twig. This caterpillar is quite common and can be found almost anywhere in North America. It is also called “measuring worm” of “inchworm”. It walks by arching its body, then stretching out and grasping the branch with its front feet, then looping its body again to bring the hind feet forward. When danger threatens, the stick caterpillar stretches its body away from the branch at an angle and remains rigid and still, like a twig, until the danger has passed. Walkingsticks, or stick insects, do not have to assume a rigid, twiglike pose to find protection, they look like inedible twigs in any position. There are many kinds of walkingsticks, ranging in size from the few inches of the North American variety to some tropical species that may be over a foot long. When at rest their front legs are stretched out. Some of the tropical species are adorned with spines or ridges, imitating the thorny bushes or trees in which they live. Leaves also seem to be a favorite object for insects to imitate. Many butter flies can suddenly disappear from view by folding their wings and sitting quietly among the foliage that they resemble.
1. What is the main subject of the passage?
A. Catepillars that live in trees
B. The feeding habits of insects
C. How some insects camouflage themselves
D. Insects that are threatened with extinction
2. In lines 1, the word “enemies”refers to.
A. other creatures competing for space
B. extreme weather conditions
C. creatures that eat insects
D. inedible insects
3. According to the passage, how does the stick caterpillar make itself look like a twig?
A. By holding its body stiff and motionless
B. By looping itself around a stick
C. By changing the color of its skin
D. By laying its body flat against a branch
4. Which of the following is true of stick insects?
A. They resemble their surroundings all the time.
B. They make themselves look like other insects.
C. They are camouflaged only when walking.
D. They change color to make themselves invisible.
5. Which of the following are not mentioned in the passage as objects that are imitated as a means of protection?
A. Thorns B.Flowers C.Leaves D.Sticks
6.In which paragraph does the author describe the way in which stick caterpillars move?
A.Paragraph one B.Paragraph two C.Paragraph three D.Paragraph four

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ID：9406-6827

Homozygous organisms produce only one type of gamete for a gene.（）

选择答案：正确错误查看解析

ID：9406-6638

（翻译）很显然，要通过这些途径增加并引导代谢物质流向，在必要时，就必须除去这些限制。

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ID：9406-6639

（翻译）热处理法能杀死土壤中大多数营养细胞群体，是选择性分离产孢子细菌，如杆菌以及放线菌的经典方法。

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