hibernate、spring和Struts这三个框架，没有任何关系。()

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发布时间：2023-04-17

更多“hibernate、spring和Struts这三个框架，没有任何关系。()”相关的问题

第1题

spring对Hibernate提供声明事务管理，与JDBC声明事务管理类似。()

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第2题

Spring is usually prime food time for some 1,200 polar bears along Canada's Hudson Bay. Ea

ch year they plunder the bay's ice floes, smash open the snow caves of seals, and stuff themselves on seal pups. But in recent years the bears' feast has turned into slimmer pickings. Why？

Temperatures at Hudson Bay have risen by one half degree Fahrenheit every decade since 1950. Winter ice on the bay melts three weeks earlier than it did just 25 years ago, which means three fewer weeks of polar bear mealtime. Result: Polar bears are 10 percent thinner and produce 10 percent fewer cubs than they did 20 years ago. And though climatologists hotly debate the causes behind Earth's Arctic meltdown, "these changes are startling and unexpected," says James McCarthy, co-leader of the United Nations Intergovernmental Panel on Climate Change.

The plight of polar bears is just the tip to the iceberg when it comes to mounting evidence of global warming. "There's definitely a stark contrast with the way things were at the start of the 20th century," says atmospheric scientist Leonard Druyan, of Columbia University. Recent data show the volume of Arctic sea ice has shrunk 20 percent since the 1950s; glaciers around the world are melting at rapidly increasing rates. Rivers and lakes in North America, Asia, and Europe now freeze about nine days later and thaw 10 days earlier than they did a century ago.

Most scientists believe the only effective strategy to halt global warming is to drastically reduce emissions of powerful air pollutants like carbon dioxide, which accounts for two-thirds of all greenhouse gases. In the last 150 years, the surging use of fossil fuels—coal, oil, and natural gas—has released 270 billion tons of carbon into the air in the form. of carbon dioxide. Fortunately, oceans, plants, and soils absorb more than half of all atmospheric carbon dioxide—without them world temperatures might have already soared at an alarming rate.

By saying "Spring is usually prime food time for 1,200 polar bears"(Line 1, Para. 1), the author means that ______.

A．spring is usually a good time for polar bears to carry out their mating rituals

B．the polar bears usually eat a lot in the spring

C．spring is generally a good time to hunt polar bears

D．polar bears usually hibernate in the spring

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第3题

根据下列文章,请回答 31～35 题。 How Animals Keep Warm Man has invented ways to keep wa

根据下列文章,请回答 31～35 题。

How Animals Keep Warm

Man has invented ways to keep warm, but how do animals defend themselves？ They cannot reason in the sense that man can, but nature has taken care of the animal kingdom by providing animals with special instincts (本能). One of these instincts is known as hibernation (冬眠).

"Sleeping like a dormouse （榛睡鼠) is not only a common saying but is a reality. When winter comes, the dormouse and other hibernating animals have reached a well-nourished state. They eat very well in warmer days laying down fat in the tissues of their bodies and during hibernation this keeps them alive. Safe in their nests, or burrows-(地洞), they sleep soundly until the warmth of spring arrives.

Bats, tortoises, snakes, frogs, even insects like butterflies, hibernate more or less completely. Some, like the squirrels (松鼠), sleep during coldest weather but are roused(弄醒) by a warm spell (暖流). During hibernation, the temperature of an animal's body drops drastically. Breathing and heart-beats almost cease.

Another instinctive method of avoiding intense cold is to escape by means of migration. Wild swans, seagulls, swallows and cuckoos are a few of the very many kinds of birds which fly thousands of miles, twice a year, to avoid cold. Many animals, especially those of the Arctic regions, have summer and winter quarters. The Arctic deer of North America, as well as the reindeer (驯鹿) of Europe, move southward towards the forests when winter approaches. They return to the northern area when the warmth of spring begins to be sensed.

There are animals which do not attempt to leave at the first sign of winter cold. Their instinctive means of defense is to dig out a deep burrow, made it soft and warm by padding (填塞）out with straw, leaves, moss and fur. In it they have a "secret place" containing food which they hope will last the winter through! Animals which fall into this class include the Arctic fox, the rabbit and the little field-mouse.

第 31 题 How does the dormouse defend itself against cold in winter？

A．It moves about to keep warm.

B．It grows thicker fur.

C．It stores fat before hibernation.

D．It goes to warmer areas.

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第4题

下列选项中，和ORM无关的选项是哪一个（)

A.mybatis

B.jsp

C.ibatis

D.Hibernate