执行政府指导价的合同，当事人一方逾期提货时恰遇政府指导价格上涨，应按( )执行。A

男，40岁。反复饥饿性上腹痛8年；多次胃镜检查诊断为十二指肠溃疡。此病人溃疡病反复发作与下列哪种细菌有关（）。

A.大肠杆菌

B.幽门螺杆菌

C.链球菌

D.空肠弯曲菌

E.葡萄球菌

__________ to sun, rain and wind for a long time, the stone split（裂开）.

A．Being exposed

B．Having exposed

C．Exposed

D．To expose

下列句子中加点的成语使用不正确的一项是（  ）

A．这个庞然大物仿佛禀赋着闻所未闻的无所不在的力量，同时向四面八方撞击。

B．半幽闭的参天树林纹丝不动地挺立着，使你觉得自己仿佛置身于一座美轮美奂的禁宫之中。

C．素芭的这种语言琳琅满目，从蟋蟀鸣叫的草地到星空无言的世界，只有手势、表情、音乐、哭泣和叹息，充盈在那广阔的语言世界。

D．村姑们匆匆忙忙地打扫干净脱粒场，有的扛着抬床，有的拿着扫帚，川流不息地奔走着。

问卷封面信的内容主要包括（）。

A．调查的主办单位或个人身份

B．调查的内容和范围

C．调查的目的

D．调查对象的选取方法

E．调查的类型

F．调查的方法

Most of us are used to seasons. Each year, spring follows winter, which follows autumn, 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.

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 either northern or southern regions.

This surprised the researchers from the University of Bern. 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 belief was held because the North Pole is surrounded by land, while the South Pole is surrounded by the Antarctic Ocean. It is easier for ice sheets to grow on land. If surrounded by sea the ice can easily just slip into the ocean instead of building up.

The researchers used a computer model to look at ways the ice could melt and how it might affect sea levels. They compared these results to evidence of how temperatures and currents actually changed during that time. The model showed that if it was only in the Northern hemisphere that ice melted, there would have been a bigger impact(影响) on ocean currents(洋流) and sea temperatures than what actually happened. Studies suggest that melting just in the Southern hemisphere would have been impossible, too. The only reasonable conclusion, the scientists could make, was that ice melted equally in the North and the South.

It is still a mystery as to what caused the temperature changes that caused the ice to melt.

小题1:The North Pole is surrounded by land, while the South Pole is surrounded by the Antarctic Ocean. So scientists thought that ________.

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 South Pole

D．The South Pole is colder than North Pole小题2:We can infer from the passage ________.

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.小题3:The scientists are not sure ________.

A．how long the ice age lasted

B．where ice sheets melted during the ice age

C．what caused the temperature changes

D．what the earth is made up of小题4:Which of the following is the best title for the passage?

A．A computer model

B．Studies show ice melted equally in the North and the South during the ice age

C．Most of the ice melted in the Northern hemisphere during the 30,000-year long ice age.

D．A survey result