题目内容

【题目】我国古书曾记载公元前28年 三月己末,日出黄,有黑气大如钱,居日中央。据此回答下列各题。

【1】记载中所说的黑气发生在太阳的(

A.光球层 B.色球层 C.日冕层 D.内部

【2】当黑子和耀斑增多时,下列关于太阳活动对地球的影响叙述正确的是(

A.使地球气候异常,从而使天文五带范围中的热带范围扩大

B.扰乱地球上空的电离层,使地面的无线电短波通讯受到影响,甚至中断

C.在地球各地的夜空都能产生极光

D.使地球的两极地区出现极昼和极夜现象

【答案】

【1】A

【2】B

【解析】

试题分析:

【1】阅读材料并结合所学的知识,可以得出记载中所说的黑气指的是太阳黑子,是光球层上常出现的暗黑的斑点。

【2】当黑子和耀斑增多时,会对地球的气候产生影响,主要表现在对降水的影响,不会对五带产生影响,会辐射电磁波,扰乱地球上空的电离层,使地面的无线电短波通讯受到影响,甚至中断,会在极地地区欣赏到美丽的极光,但不会产生极昼和极夜现象。

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【题目】Good news for giant panda lovers: The cute and cuddly creature has just been brought back from the brink of extinction. The International Union for Conservation of Nature (IUCN) downgraded the species from “endangered” to vulnerable as the union released its updated Red List on Sept 4 at Hawaii.

The downgrade came after IUCN data suggested that there were 1,864 giant pandas in the wild in China in 2014 their population has grown by 17 percent in the decade leading up to 2014.

Chinese conservation efforts, including forest protection and reforestation, are considered to be the driving force behind the animal’s resurgence.

“It’s all about restoring the habitats,” Craig Hilton-Taylor, head of the IUCN Red List, told the BBC.

The number of panda reserves in China has also jumped to 67, from 13 in 1992. Nearly two-thirds of all wild pandas live in these reserves, according to the World Wildlife Fund.

“Just by restoring the panda’s habitat, that’s given them back their space and made food available to them,” Hilton-Taylor said.

A loss of habitats, on the contrary, was what caused the number of pandas to drop to just over 1,200 in the 1980s, Hilton-Taylor added.

Apart from giant pandas, the Tibetan Antelope has also moved from “endangered” to “near threatened”. According to a statement from IUCN, the animal’s numbers dwindled severely dropping from around 1 million to an estimated 65,000-72,500 in the 1980s and early 1990s due to commercial poaching. Rigorous(严格的) protection has since been enforced to protect the beasts and the population is now likely to be between 100,000 and 150,000.

Despite the improved statuses, wild animals like the giant panda and the Tibetan Antelope still face great challenges. The IUCN warned, for example, that ongoing threats from climate change could eliminate more than 35 percent of the panda’s bamboo habitat in the next 80 years, which would reverse the species recent gains.

【1】What does the underlined word “vulnerable” in paragraph 1 mean?

A. dangerous and threatened.B. safe and sound.

C. weak and easily hurt.D. normal and common.

【2】Which of the following can account for pandas’ living improvement?

A. Better climate.B. More built reserves.

C. Well restored habitats.D. Aroused public awareness.

【3】The passage is written in order to ________.

A. convinceB. informC. argueD advocate

【4】What does the last paragraph imply?

A. The climate will influence the threatened species.

B. Habitats for giant pandas will decrease sharply.

C. Pandas will go extinct for lack of abundant food.

D. We humans still have a long way to go to protect the endangered species.

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