Question

【題目】 Polar bears(北極熊) are in great danger. And human beings are possibly the cause of the danger. As we burn gas to produce electricity or get us around town in our cars and trucks, we create tons of carbon dioxide (二氧化碳). This is causing global warming.

Polar bears need sea ice to live because the ice is their hunting ground. The bears’ main source of food is the meat of seals(海豹). These animals come to surface holes in the ice to breath. It is there that the polar bears catch the seals. Without any ice, there is nowhere for bears to hunt. The seals hardly come onto the land and spend their time out on the sea ice.

In recent years, the seal ice has disappeared in the Arctic during the late summer. This is dangerous for the polar bears, as they depend almost only on seals for food. Unlike brown and black bears, polar bears do not hibernate(冬眠) during the winter. Only female polar bears will go into a “l(fā)ittle house” and stay for a long time if they are giving birth to baby bears.

It may be strange to think about, but winter is the time for polar bears to get food while summer is the time of hunger. The bears have got used to a cold world, and they need the low temperatures in order to stay alive. If the world continues to warm up and sea ice is absent for longer and longer periods of time, polar bears might unluckily go the way of dinosaurs (恐龍).

【1】Because of human beings, all the bears in the world are facing great danger now.

【2】If there are no seals on the sea ice, polar bears may have no food to eat.

【3】Unlike brown and black bears, only female polar hibernate in winter.

【4】Polar bears can get much more food in summer than in winter.

【5】Global warming may make polar bears die out in the future.

Answer 1

【答案】

【1】B

【2】A

【3】B

【4】B

【5】A

【解析】

本文主要講述北極熊現(xiàn)在處于危險之中，人類可能是造成這種結(jié)果的原因，如果北極熊的處境越來越糟，它們很可能會重蹈恐龍滅絕的覆轍。

【1】細(xì)節(jié)理解題。根據(jù)第一段中“Polar bears(北極熊) are in great danger. And human beings are possibly the cause of the danger.”可知，人類可能是造成北極熊處于極大危險中的原因，并不確定是造成這種危險的原因。該項表述錯誤，故選B。

【2】推理判斷題。根據(jù)“This is dangerous for the polar bears, as they depend almost only on seals for food.”可知，北極熊幾乎只以海豹為食。所以如果海冰上沒有海豹，北極熊可能就沒有食物可吃了。該項表述正確，故選A。

【3】細(xì)節(jié)理解題。根據(jù)“Unlike brown and black bears, polar bears do not hibernate(冬眠) during the winter. Only female polar bears will go into a “l(fā)ittle house” and stay for a long time if they are giving birth to baby bears.”可知，母北極熊在生熊寶寶的時候才會進(jìn)入“小房子”待很長一段時間，并不是在冬眠。該項表述錯誤，故選B。

【4】推理判斷題。根據(jù)“It may be strange to think about, but winter is the time for polar bears to get food while summer is the time of hunger.”可知，冬天是北極熊覓食的季節(jié)，而夏天是饑餓的季節(jié)。所以推測北極熊在冬天比在夏天能得到更多的食物。該項表述錯誤，故選B。

【5】推理判斷題。根據(jù)“If the world continues to warm up and sea ice is absent for longer and longer periods of time, polar bears might unluckily go the way of dinosaurs (恐龍).”可知，如果世界繼續(xù)變暖，海冰消失的時間越來越長，北極熊可能會不幸走上恐龍的道路。所以推測全球變暖可能使北極熊在未來滅絕。該項表述正確，故選A。