Sea horses have unusual parents. The female sea horses lay t..

第1题

Among the following statements, which is tree about sea horse？A．The sea horse has a long s

Among the following statements, which is tree about sea horse？

A．The sea horse has a long snout that is not convenient for sucking.

B．Sea horses have no scales at all.

C．The sea horse is unable to grasp sea grass or coral.

D．Sea horse can move very fast over long distance.

点击查看答案

第2题

听力原文：Today we are going to talk about a species of fish that is rather unique: Today's

听力原文： Today we are going to talk about a species of fish that is rather unique: Today's lecture is about sea horses, if you've seen a sea horse, you may have noted that it has a horse-like head attached to its body. The sea horse has a long snout that is good for sucking. Instead of scales like most fish, sea horses have skin that is stretched over bony plates. The body extends to a prehensile tail, meaning that the tail can be used to grasp. The sea horse may grasp sea grass or coral to keep it stable in a moving current.

The sea horse has fins on its back that it can use to propel it through the water. However, sea horses aren't very good swimmers. They do not move quickly over great distances. The sea horse also has chest fins that it uses for stabilization. The chest fins help the sea horse float in an upright position.

One particularly unique feature of sea horse is that only the male becomes pregnant. The female inserts ripe eggs into the male' pouch, where they are fertilized. The eggs become embedded in the pouch wall.

What is this lecture mainly about？

A．Usual Species of fish.

B．Characteristics of a unique sea animal.

C．The harvest of fish eggs.

D．Unusual species of horses.

点击查看答案

第3题

根据以下材料，回答题Sea HorsesSea horses are unusual parents. The female sea horses lay the

根据以下材料，回答题

Sea Horses

Sea horses are unusual parents. The female sea horses lay the eggs， but unlike other creatures，it"s the males that give birth to the young.

Male sea horses have a fold of skin on their bellies that forms pocket， called a brood pouch.

During the breeding season， the sea horse"s pouch swells to receive eggs. A female sea horse lays up to 200 eggs at a time in the pouch. Then she swims off， leaving her male partner to care for the developing eggs and give birth to young sea horses. The female will return everyday to check on her mate and the eggs， but she doesn"t stay long， nor does she take part in the birth.

It takes from two to six weeks for the eggs in the male"s pouch to develop. During this time the male avoids open water and hides in sea grass. His big pouch makes it difficult for him to swim， so the male often uses his tail to grasp a piece of sea grass. Firmly gripping the grass， he will stay perfectly still for hours or even days. The male sea horse will change his color to blend with his surroundings and avoid being seen by predators who will try to eat him or poke holes in his pouch to get the eggs.

The eggs hatch inside the male"s pouch. When the babies begin moving around， the male sea horse knows it"s time for them to be born. He grabs a sea grass stem with his tail and begins rocking， bending， and stretching his body so that the rest of the babies can be born. Sometimes he has to press his pouch against a rock or some stiff seaweed to force the young out.

Sea horse babies are bom in groups of five or more. Sometimes it takes two days for the father sea horse to give birth to all his young. He is very tired when it"s over.

Soon after giving birth to one brood， the male will approach his mate and show her his empty pouch. This tells her he is ready to receive eggs again.

What part does the female sea horse play in having babies？查看材料

A.Receiving eggs.

B.Laying eggs.

C.Hatching eggs.

D.Protecting eggs.

点击查看答案

第4题

请根据短文的内容，回答题。

Sea Horses

Sea horses are unusual parents. The female sea horses lay the eggs, but unlike other creatures,it&39;s the males that give birth to the young.

Male sea horses have a fold of skin on their bellies that forms pocket, called a brood pouch.

During the breeding season, the sea horse&39;s pouch swells to receive eggs. A female sea horse lays up to 200 eggs at a time in the pouch. Then she swims off, leaving her male partner to care for the developing eggs and give birth to young sea horses. The female will return everyday to check on her mate and the eggs, but she doesn&39;t stay long, nor does she take part in the birth.

It takes from two to six weeks for the eggs in the male&39;s pouch to develop. During this time the male avoids open water and hides in sea grass. His big pouch makes it difficult for him to swim, so the male often uses his tail to grasp a piece of sea grass. Firmly gripping the grass, he will stay perfectly still for hours or even days. The male sea horse will change his color to blend with his surroundings and avoid being seen by predators who will try to eat him or poke holes in his pouch to get the eggs.

The eggs hatch inside the male&39;s pouch. When the babies begin moving around, the male sea horse knows it&39;s time for them to be born. He grabs a sea grass stem with his tail and begins rocking, bending, and stretching his body so that the rest of the babies can be born. Sometimes he has to press his pouch against a rock or some stiff seaweed to force the young out.

Sea horse babies are born in groups of five or more. Sometimes it takes two days for the father sea horse to give birth to all his young. He is very tired when it&39;s over.

Soon after giving birth to one brood, the male will approach his mate and show her his empty pouch. This tells her he is ready to receive eggs again.

What part does the female sea horse play in having babies？查看材料

A.Receiving eggs

B.Laying eggs

C.Hatching eggs

D.Protecting eggs

点击查看答案

第5题

A patrol team of sea lions and dolphins featured in a large-scale military exercises being

conducted by the U. S. and its allies in the Pacific Ocean. The machine (1) took part in simulated mine recovery and mine detection missions during the biennial Rim of the Pacific Exercise (RIMPAC) war games. The (2) started on June 19 and will run (3) Friday.

"There are a number of mechanical systems that work in those areas. (4) high-tech gadgets deployed by the military can't (5) the natural skills of dolphins and lions," said Tom Lapuzza, spokesman for UN Navy's Marine Mammal Program. Sea lions have "incredible good underwater (6) " and can dive down to 300 meters to catch a recovery line to a mine, he said. Dolphins use sonar to (7) mine.

Human beings have a long (8) of training animals to join the military. Horses have been the most widely-used animals (9) the recorded history of (10) . In early times, horses were used to (11) chariots or to (12) armored forces. With the development of modem weapons and motorized (13) , the use of horses for military purposes fell into (14) . (15) , horses were still used (16) by the German army during World War II for transporting (17) and equipment, including artillery.

During World War II, (18) with explosives strapped to their backs were used as anti-tank weapons. In other (19) , they were used for detecting mines. Some dogs were also used as messengers.

Other animals have also (20) in the military. Recorded history shows the use of elephants for military purposes as early as 1,100 B. C.. They were employed during World War II by both the Japanese army and the (21) .

There are records showing that over 100,000 reindeer were used by Finland to tow sleds during World War II. They carried the (22) to hospitals, brought supplies to the troops and moved heavy anti-tank weapons. It is well documented that oxen have been (23) used in war as improvised beasts of burden. During World War II, spiders were employed by the Allies to spin silk for (24) in cross-hairs on bomb scopes and other optical instruments. People also are finding that Vampire bats' ability to use echolocation is very interesting as we (25) to learn how it works and it may benefit the army.

(111)

点击查看答案

第6题

根据短文内容，回答题。

Sea Horses

Sea horses are unusual parents. The female sea horses lay the eggs, but unlike other creatures,it&39;s the males that give birth to the young.

Male sea horses have a fold of skin on their bellies that forms pocket, called a brood pouch.

During the breeding season, the sea horse&39;s pouch swells to receive eggs. A female sea horse lays up to 200 eggs at a time in the pouch. Then she swims off, leaving her male partner to care for the developing eggs and give birth to young sea horses. The female will return everyday to check on her mate and the eggs, but she doesn&39;t stay long, nor does she take part in the birth.

It takes from two to six weeks for the eggs in the male&39;s pouch to develop. During this time the male avoids open water and hides in sea grass. His big pouch makes it difficult for him to swim,so the male often uses his tail to grasp a piece of sea grass. Firmly gripping the grass, he will stay perfectly still for hours or even days. The male sea horse will change his color to blend with his surroundings and avoid being seen by predators who will try to eat him or poke holes in his pouch to get the eggs.

The eggs hatch inside the male&39;s pouch. When the babies begin moving around, the male sea horse knows it&39;s time for them to be born. He grabs a sea grass stem with his tail and begins rocking, bending, and stretching his body so that the rest of the babies can be born. Sometimes he has to press his pouch against a rock or some stiff seaweed to force the young out.

Sea horse babies are born in groups of five or more. Sometimes it takes two days for the father sea horse to give birth to all his young. He is very tired when it&39;s over.

Soon after giving birth to one brood, the male will approach his mate and show her his empty pouch. This tells her he is ready to receive eggs again.

What part does the female sea horse play in having babies？查看材料

A.Receiving eggs

B.Laying eggs

C.Hatching eggs

D.Protecting eggs

点击查看答案

第7题

The bathing machine was used ______.A. so that the horses could drink at the water's edgeB

The bathing machine was used ______.

A. so that the horses could drink at the water's edge

B. so that the hood could be projected towards the sea

C. so that the bather could hide from the sea

D. so that the bather could be screened(掩蔽)until she was in the sea

点击查看答案

第8题

MODERATE WAVES, TAKING A MORE PRONOUNCED LONG FORM;MANY WHITE HORSES ARE FORMED. This sea

condition is likely to be termed ______.

A.near gale

B.moderate breeze

C.fresh breeze

D.strong breeze

点击查看答案

第9题

Most people have no idea of the hard work and worry that go into the collecting of those f

ascinating birds and animals which they pay to see in the zoo. One of the questions that is always asked of me is【C1】______. I became an animal collector in the first【C2】______. The answer is that I have always been interested in animals and zoos. According to my parents, the first word I was able to say with any【C3】______was not the conventional"mamma"or"daddy",【C4】______the word"zoo", which I would【C5】______over and over again with a shrill【C6】______until someone, who quickly【C7】______me up, would take me to the zoo. When I【C8】______a little older, we lived in Greece and I had a great【C9】______of pets, ranging from owls to sea horses, and I spent all my spare time【C10】______the countryside in search of fresh specimens to【C11】______to my collection of-pets. 【C12】______ on I went for a year to the City Zoo, as a student【C13】______, to get experience of the large animals, such as lions, bears, bison(美洲野牛) and ostriches(鸵鸟),【C14】______were not easy to keep at home. When I left, I【C15】______ had enough money of my own to be able to【C16】______my first trip and I have been going【C17】______ever since then. Though a collector's job is not an easy one and is full of【C18】______, it is certainly a job which will appeal【C19】______all those who love animals and【C20】______.

【C1】

A．how

B．where

C．when

D．whether

点击查看答案

第10题

A suitable title for this passage would be ______.A. Sea Bathing Through the AgesB. Bathin

A suitable title for this passage would be ______.

A. Sea Bathing Through the Ages

B. Bathing Clothes Through the Ages

C. Sea Horses

D. A Hundred Years of Sun Bathing

点击查看答案

Sea horses have unusual parents. The female sea horses lay the eggs, but unlike other crea