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听力原文: A country's latitude, or distance from the equator, has an important effect on i

ts climate. In places located at low latitudes, or near the equator, like Ecuador and northern Brazil, the amount of sunshine changes the least during the year. At mid-latitudes, in places like Japan or Argentina, there is more sunshine in the summer than in the winter. (29) The greatest change occurs at the highest latitudes, in places like northern Canada or Alaska. In these places, the nights are very long for half the year and the days are very long during the other half. At the North or South Pole, sunlight lasts the longest during the summer. But light and heat are the most intense at the equator.

Latitude and distance from the sea also affect climate. The thin air in high mountain areas absorbs less of the sun's heat than the thicker air at sea level.

The daily change in temperature also increases with distance from the sea.

(30) Snow and rain are very important to climate. Snow reflects as much as eighty or ninety percent of the heat from the sun, and makes the weather even colder. But a large forest area can reflect as little as five percent of the sun's heat. This makes the weather warmer.

Of course, the general effects of climate do not explain everything about the weather. For example, (31) both the driest place in the world and the place with the most rainy days are located in Chile. Calama, in the Atacama Desert. has had no rain for over 400 years. But during the year 1916, it rained in Bahia, Felix, Chile for 348 days.

(30)

A.At low latitudes.

B.At mid-latitudes.

C.At high latitudes.

D.At any latitude.

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更多“听力原文: A country's latitude, or…”相关的问题

第1题

患者男,46岁。既往有高血压史,突然出现剧烈胸痛,呈撕裂状,累及胸骨后及上腹部,伴大汗,持续1h不缓解。体格检查:血压200/110mmHg(26.7/14.7kPa),心率90次/min,两肺(-),心脏(-)。心电图示:左室高电压,伴V4~V6ST段压低0.1mV。患者突然出现双下肢运动障碍,意识模糊,血压140/80mmHg(18.7/10.7kPa),心率86次/min,持续1d,头部CT

A.脑梗死

B.脑出血

C.主动脉夹层累及颈动脉和肋间动脉

D.短暂性脑缺血发作

E.心源性脑缺血

F.脑栓塞G.低氧血症

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第2题

患者男,46岁。既往有高血压史,突然出现剧烈胸痛,呈撕裂状,累及胸骨后及上腹部,伴大汗,持续1h不缓解。体格检查:血压200/110mmHg(26.7/14.7kPa),心率90次/min,两肺(-),心脏(-)。心电图示:左室高电压,伴V4~V6ST段压低0.1mV。目前应考虑的可能诊断是()

A.急性心肌梗死

B.主动脉夹层破裂

C.自发性气胸

D.肺动脉栓塞

E.急性心脏压塞

F.胸膜炎

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第3题

患者男,46岁。既往有高血压史,突然出现剧烈胸痛,呈撕裂状,累及胸骨后及上腹部,伴大汗,持续1h不缓解。体格检查:血压200/110mmHg(26.7/14.7kPa),心率90次min,两肺(-),心脏(-)。心电图示:左室高电压,伴V4~V6ST段压低0.1mV。为明确诊断应立即进行的检查项目是()

A.血沉

B.血气分析和D-二聚体

C.继续监测心电图演变

D.X线胸片

E.心脏多普勒超声

F.血心肌酶

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第4题

患者男,46岁。既往有高血压史,突然出现剧烈胸痛,呈撕裂状,累及胸骨后及上腹部,伴大汗,持续1h不缓解。体格检查:血压200/110mmHg(26.7/14.7kPa),心率90次/min,两肺(-),心脏(-)。心电图示:左室高电压,伴V4~V6ST段压低0.1mV。为明确诊断应立即进行的检查项目是()

A.心脏多普勒超声

B.X线胸片

C.继续监测心电图演变

D.血心肌酶

E.血沉

F.血气分析和D-二聚体G.双下肢血管超声

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第5题

男性,46岁,既往有高血压病史,突然出现剧烈胸痛,呈撕裂状,累及胸骨后及上腹部,伴大汗,持续1小时不缓解。查体:血压200/110mmHg,心率90/min,心(-),两肺(-),心电图:左室高电压伴V4~6ST压低0.1mV,最可能的诊断是()

A.冠心病、心绞痛

B.气胸

C.肺动脉栓塞

D.冠心病、心肌梗死

E.主动脉夹层

点击查看答案

第6题

男性患者,46岁,既往有高血压病史,突然出现剧烈胸痛,呈撕裂状,累及胸骨后及上腹部,伴大汗,持续1h
不缓解。查体:血压200/110mmHg(26.7/14.7kPa),心率90/min,心(-),两肺(-),心电图:左室高电压,V4~V6ST段压低0.1mV。最可能的诊断是

A.冠心病、心绞痛

B.冠心病、心肌梗死

C.肺动脉栓塞

D.气胸

E.主动脉夹层

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