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Bees are very small animals which fly through the air to look for flowers【B1】. When a bee【

B2】some food, it re turns to the hive and dances. The dance is the way a bee【B3】to other bees that is has found food.

Bees do two kinds of【B4】to tell other bees of their【B5】of food. First, there is a round dance.【B6】this dance, the bee moves in a【B7】inside the hive. The round dance is used【B8】the food is close by. The food must not be more than ten meters【B9】If a bee comes back and dance a round dance, other bees know they must go out and look nearby for food. The bees also【B10】the bee that has found the food. The smell tells them what kind of flower to【B11】After watching the round dance and smelling the bee【B12】has found the food, the other bees can find the other source.

A second kind of dance【B13】by the bee is a tail-wagging dance. In this dance, the bee wiggles the【B14】of its body as it moves in a【B15】line. The tail-wagging dance is used when the food is far away. The food must be【B16】ten meters away. The bees know from the speed of the tail-wagging dance just how far away the food source is. The line the bee dances on shows the direction that the bees【B17】fly into find the food. In the tail-wagging dance, the bees also smell the bee【B18】has found the food. The smell tells them what kind of flowers to look for. After watching the tail-wagging dance and smelling the bee that has found the food, the other bees know【B19】things. They know how far【B20】fly, what direction to fly in, and what kind of flowers to look for.

【B1】

A．for food

B．for eating

C．to eat

D．for eating food

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发布时间：2020-08-04

更多“Bees are very small animals which fly through the air to look for flowers【B1】. When a bee【”相关的问题

第1题

90．It's very small loss．______（不要大惊小怪)．

90．It's very small loss．______(不要大惊小怪)．

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第2题

Bees and ColorOn our table in the garden we put a blue card, and all around this blue card

Bees and Color

On our table in the garden we put a blue card, and all around this blue card we put a number of different gray cards. These gray cards are of all possible shades of gray land include white and black. on each card a watch-glass is placed .The watch-glass on the blue card has some syrup (果汁) in it; all the others are empty. After a short time bees find the syrup, and they come for it again and again. Then, after some hours, we take away the watch-glass of syrup which was on the bluecard and put an empty one in its place.

Now what do the bees do？ They still go straight to the blue card, although there is no syrup there. They do not go to any of the gray cards, in spite of the fact that one of the gray cards is of exactly the same brightness as the blue card. Thus the bees do not mistake any shade of gray. for blue. In his way we have proved that they do really see blue as a color.

We can find out in just the same way what other colors bees can see. It turns out that bees can see various colors, but these insects differ from us as regards their color-sense in two very interesting ways. Suppose we train bees to come to a red card, and, having done so, we put the red card on the table in the garden among the set of different gray cards. This time we find that the bees mistake red for dark gray or black. They cannot distinguish between them. This means that red is not a color at all for bees; for them it is just dark gray or black.

That is one strange fact; here is another. A rainbow is red on one edge, violet on the other. Outside the violet of the rainbow there is another color which we cannot see at all. This color beyond the violet, invisible to us, is called the ultra-violet. Although it is invisible, we know that the ultra -violet is there because it affects a photographic plate. Now, although we are unable to see ultra -violet light, bees can do so; for them ultra -violet is a colon Thus bees see a color which we cannot even imagine. This has been found out by training bees to come for syrup to various parts of a spectrum, or artificial rainbow, thrown by a prism on a table in a dark room. In such an experiment the insects can be taught to fly to the ultra-violet, which for us is just darkness.

Experiment with bees described in the first and second paragraphs tell us that bees regard blue as a colon

A．True

B．False

C．Not mentioned

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第3题

Vitamins are complex ________ that the body requires in very small mounts. A．matte

Vitamins are complex ________ that the body requires in very small mounts.

A．matters

B．materials

C．particles

D．substances

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第4题

If your wages are very small, they'll be free ______ income tax.A．withB．aboutC．toD．of

If your wages are very small, they'll be free ______ income tax.

A．with

B．about

C．to

D．of

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第5题

A．The room is too small for the audience.B．The show is very difficult to understand.C．

A．The room is too small for the audience.

B．The show is very difficult to understand.

C．The light in the room is not bright enough.

D．The crowd is Very noisy.

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第6题

This_______a small firm like ours to compete with multinational companies on a very global

basis with very low costs.

A．offers

B．becomes

C．accepts

D．allows

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第7题

A microscope ______.A．is called a pair of glassesB．can make very small things look much bi

A microscope ______.

A．is called a pair of glasses

B．can make very small things look much bigger

C．can help you are blind

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第8题

It's very small loss．______（不要大惊小怪)．

It's very small loss．______(不要大惊小怪)．

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第9题

The word "fraction" in the second paragraph means______A．a very small amount.B．a large are

The word "fraction" in the second paragraph means______

A．a very small amount.

B．a large area.

C．an important system.

D．a major source of information.

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