This species has nearly because its habitat is being destroyed. A．died downB．died outC．turned downD．turned up 题目和参考答案——青夏教育精英家教网—

题目内容

This species has nearly _________because its habitat is being destroyed.

A．died down

B．died out

C．turned down

D．turned up

解析

练习册系列答案

68所名校图书小升初高分夺冠真卷系列答案

伴你成长周周练月月测系列答案

小升初金卷导练系列答案

萌齐小升初强化模拟训练系列答案

相关题目

The scientists were trying to look for all possible _______ as to where this species came from.

If you are afraid of the dark，it’s not a big deal．It’s perfectly normal to feel afraid After all，animals do too. “Fear matters，”says Karen Warkentin，an ecologist．“It’s a good thing，” she adds, “because fear makes you do things that keep you alive.”
Like kids，many animals experience fear and they respond to the feeling in variety of ways．A
frightened turtle pulls its head and legs inside its shell．A small fish will swim away when a big，hungry fish approaches．
Some animals respond to fear in ways you might not expect．The first example is that the fear of being eaten can scare some frogs right out of their eggs. Warkentin made the surprising discovery while studying red—eyed tree frogs in Costa Rica.
In this species，female frogs attach jellylike clumps（果冻一样的块状物）of their eggs to the undersides of leaves．The leaves hang on branches that dangle（悬挂）over ponds．After they hatch from the eggs，the tadpoles（蝌蚪）then fall into the water，where they eventually grow into
adult frogs.
Tree frog eggs usually grow for 6 days before hatching．If they sense that a hungry snake is about to attack，however，they can hatch up to 2 days ahead of schedule. As the snakes are unable to swim，by falling into the water early，the tadpoles can escape.
If hatching early helps protect red—eyed tree frogs from snakes，you might wonder why their eggs don’t always hatch sooner．It turns out that hatching early brings its own danger．Once tadpoles land in the water，hungry fish and other animals like to eat them too．Staying in their eggs for a full 6 days，then，allows frog embryos（胚胎）to grow big and strong．This extra growth improves their chances of surviving in the water．
68．It can be inferred from the passage that fears______
A．help animals grow bigger and stronger
B．are less common among young animals
C．help animals move a lot to fit the environment
D．are more or less important in order for animals to survive
69．We are told in the passage that tree frogs______
A．face danger both inside their eggs and in the water
B．will grow fast if they fall into the water later
C．are surprisingly clever when inside their eggs
D．stay in their eggs longer if they are frightened
70．What do you think would be discussed in the following paragraph?
A．Further explanations as to why tree frogs hatch ahead of schedule．
B．How the unborn frogs know when a snake is about to attack them．
C．Another example of animals that responds to fear in an unexpected way．
D．How tree frogs improve their chances of survival before falling into the water.

Tony Burke, Australia’s environment minister, says he won’t decide until next year whether the koala should be protected as an endangered species. He was expected to make his decision by the end of October. But that decision has been put off. Burke said he needed more time to go over the latest information about the koala’s population.
In September, an Australian Senate committee reported that there was no question the koala’s population is on the decrease. “But they may not yet be eligible (符合条件) for listing as a threatened species,” said Senator Doug Cameron. “To have such a significant Australian icon(偶像) included on the threatened species list would be a national shame.”
The koala is found only in the eucalyptus (桉树) forests of Australia. And its population is reported to have fallen sharply for many reasons, including the cutting down of forests to make way for human beings’ development, their own illness, climate change and killings by other animals such as wild dogs. And every year many koalas are hit by cars as they are trying to cross the busy roads.
Putting off the decision on protection for the koala “is really bad news,” said Debbie Pointing, the president of the Koala Action Group. “We’ve worked tirelessly for many years to gather data on the populations,” Pointing said. “That data should be enough to make a decision.”
However, Burke pointed out that the Australian government had spent at least $6.3 million on koala conservation efforts since 1996. senators listed efforts that are already underway in Queensland – the construction of special koala bridges as well as fences along roads, to keep the animals out of harm’s way.
Some people say that is not enough. “What we’re doing at the moment is likely to drive this species to extinction,” Queensland University zoologist Bill Ellis said.
“Koalas are an iconic Australian animal,” Burke told Australians. “They hold a special place in the hearts of Australians.”
But it is a fact that if more isn’t done to protect the koala, they might soon hold a place only in Australians’ memories.
【小题1】Tony Burke put off announcing the koala as an endangered species because .

A．he needed more time to examine latest information

B．he doubted whether koalas’ number is decreasing

C．he was thinking about ways to protect koalas

D．he had more important issues to deal with

【小题2】What is Paragraph 3 mainly about?

A．The habitat of the koala.

B．Australia’s traffic problems.

C．The importance of koalas for Australians.

D．Reasons for the decrease of the koala population.

【小题3】According to the text, Debbie Pointing thinks that .

A．the construction of special koala bridges is of little use

B．the government should announce the koala as an endangered species