填表。形体名称已知条件表面积体积长方体长4米，宽3米，宽2米正方体棱长3米圆柱底

D

It’s hardly surprising that weather is a favorite topic for so many people around the world---it affects where we choose to live, what we wear, our moods, and perhaps even our national characteristics．Studies have shown that changeable weather can make it difficult to concentrate, cloudy skies slow down reaction, and high humidity with hot, dry winds makes many people bad-tempered．

If you live in a place like Britain, where the weather seems to change daily if not hourly, you could be forgiven for thinking that the weather is random．In fact, the weather is controlled by systems which move around areas of the globe．In the UK the weather depends on depressions, often called lows, and anticyclones, also known as highs．These systems start in the Atlantic Ocean, and make their way across the British Isles from the west to the east．Highs bring sunny weather, while lows bring rain and wind．In modern times, human activities seem to be altering weather patterns．Gases produced by heavy industry change the temperature of the Earth’s surface, and affect cloud formation．Some researchers say that factories in Europe and North America may have been one of the causes of the droughts in Africa in the 1980s．

The human race has always tried to guess the weather, especially in areas of the world where there are frequent changes．Traditional rhymes point to early attempts to identify weather patterns, popular poems include:

Red sky at night, shepherds’ delight; red sky in the morning, shepherds’ warning．

Flies will swarm before a storm．

Rain before 7, clear by 11．

While folk wisdom can still provide a guide to help forecast weather, today’s methods of prediction increasingly rely on technology．Satellites, balloons, ships, aircrafts and weather centers with sensitive monitoring equipment, send data to computers．The data is then processed, and the weather is predicted．However, even this system cannot predict weather for longer than about a week．

66．When weather keeps changing, _____________．

A．people become bad-tempered

B．people’s reaction slows down

C．people find it hard to focus on their work

D．people become hungrier

67．What is mainly talked about in the second paragraph?

A．Changes in weather．     B．Weather in Britain．

C．African droughts．  D．Research on weather．

68．The weather in Britain is _______________．

A．random    B．moist C．depressing D．satisfying

69．According to a traditional rhyme, if there is a red sky at night, the next day will be _______．

A．windy      B．rainy C．fine   D．snowy

70．Which of the following statements is true?

A．Anticyclones often bring rain and wind．

B．Weather forecasting has been done for a long time．

C．Weather could never be predicted．

D．Modern methods of weather prediction are developed from folk wisdom．

疟疾的主要临床特点是（）

A.发热

B.寒热定时

C.恶寒

D.头痛

医务社会工作中，化解医患矛盾的核心是( )。

A．公平化

B．医患之间的有效沟通

C．信息公开化

D．提供危机介入

石榴栽培中应注意哪些问题？

铲运机不适用于开挖（）

A、一类土

B、二类土

C、三类土

D、四类土