Most of-us are used to seasons. Each year, spring follows winter, which follows au-tumn, which follows summer, which follows spring. And winter is colder than summer.But the earth goes through temperature cycles over much longer periods than those that we experience. Between 65,000 and 35,000 years ago, the planet was much colder than it is now. During that time the temperature also changed a lot, with periods of warming and cooling. Ice melted during the warm periods, which made sea levels rise. Water froze again during the cold periods.
(77) A new study from Switzerland sheds light on where ice sheets melted during the ice age. It now seems that the ice melted at both ends of the earth, rather than just in ei-ther northern or southern regions.
This surprised the researchers from the University of Bern. (78) Scientists have long assumed that most of the ice that melted was in the Northern hemisphere (半球) during the 30,000-year long ice age. That be
A. most of the ice melted in the Northern hemisphere
B. most of the ice melted in the Southern hemisphere
C. The North Pole is colder than the South Pole
D. The South Pole is colder than the North Pole
Most of-us are used to seasons. Each year, spring follows winter, which follows au-tumn, which follows summer, which follows spring. And winter is colder than summer.But the earth goes through temperature cycles over much longer periods than those that we experience. Between 65,000 and 35,000 years ago, the planet was much colder than it is now. During that time the temperature also changed a lot, with periods of warming and cooling. Ice melted during the warm periods, which made sea levels rise. Water froze again during the cold periods.
(77) A new study from Switzerland sheds light on where ice sheets melted during the ice age. It now seems that the ice melted at both ends of the earth, rather than just in ei-ther northern or southern regions.
This surprised the researchers from the University of Bern. (78) Scientists have long assumed that most of the ice that melted was in the Northern hemisphere (半球) during the 30,000-year long ice age. That be
A. the ice can easily just slip into the ocean
B. volcanoes caused the ice to melt
C. melting just in the Northern hemisphere would have been impossible
D. researchers often use the computer models help their research work
| Last spring, sixteen-year-old Donald
Gomes had a problem. Like a lot of children, Donald was fond (喜欢的) of sports.
But he didn’t want to play basketball or football, He wanted to play volleyball
(排球). But Donald’s high school didn’t have a boys’ volleyball team (队，组). So what did he do . He tried to join the girls’ team. And he made it. With that Donald thought (认为, 考虑) his problem was over. But a bigger problem was just beginning (开始,起源). The school didn’t agree that Donald should play on the girls’ team. "If we let Donald on the team," the school said," other boys will want to join. Pretty (相当) soon, there won’t be any girls on the team. And that would not be fair (定期集市,公平的) to the girls." They took Donald off the team. So, Donald took his case to a judge (判断). Donald was not allowed to play only because he was a boy. This reason, the [单项选择]Last spring, sixteen-year-old Donald Gomes had a problem. Like a lot of children, Donald was fond (喜欢的) of sports. But he didn’t want to play basketball or football, He wanted to play volleyball (排球).
But Donald’s high school didn’t have a boys’ volleyball team (队，组). So what did he do . He tried to join the girls’ team. And he made it. With that Donald thought (认为, 考虑) his problem was over. But a bigger problem was just beginning (开始,起源). The school didn’t agree that Donald should play on the girls’ team. "If we let Donald on the team," the school said," other boys will want to join. Pretty (相当) soon, there won’t be any girls on the team. And that would not be fair (定期集市,公平的) to the girls." They took Donald off the team. So, Donald took his case to a judge (判断). Donald was not allowed to play only because he was a boy. This reason, the judge said, is sex discrimination (性别歧视). He then told the school to let Donald back on his team. Donald Gomes’ favorite sp A. football B. volleyball C. basketball [单项选择]
Vacationing in Mexico
在墨西哥度假
Each year more travelers are finding their way to the sun coasts of Mexico; where ancient civilizations once honored the sun, modern sun worshippers are discovering superb vacation destinations. Airlines now schedule weekly flights from major national and international points to a variety of sun coast resort areas. 我来回答: 提交
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