Briti.sh Columbia is the third largest Canadian province, both in area and population.It is nearly one and a half times as large as Texas, and extends 800 miles (1,280 km)north from the United States border.___46____.
Most of British Columbia is mountainous, with long, rugged ranges running north
and south.___47____. During the last Ice Age, this range was scoured (侵蚀) by glaciers(冰川) until most of it was beneath the sea. Its peaks now show as islands scattered alongthe coast.
The southwestern coastal region has a humid mild marine climate. Sea winds that blow inland from the west are warmed by a current of warm water that flows through
the Pacific Ocean, As a result, winter temperatures average above freezing and summers are mild.___48____.
____49____. As they rise to-cross the mountains, the winds are cooled, and their moisture begins to fall as rain. On some of the western slopes almost 200 inches (500 cm)of rain fall each year.
Morethan half of British Columbia is heavily forested.____50___. These forest giants often grow to be as much. as 300 feet (90m) tall, with diameters upto 10 feet (3m). More lumber is produced from these trees than from any other kind of tree in North America.
A. On mountain slopes that receive plentiful rainfall, huge Douglas firs (洋松) rise in towering columns
B. It includes Canada's entire west coast and the islands just off the coast
C. These warm western winds also carry moisture from the ocean
D. Plants are the basis of the food pyramid for all living things, even for other plants
E. Even the coastal islands are the remains of a mountain range that existed thou-sands of years ago
F. Inland from the coast, the winds from the Pacific meet the mountain barriers of the coastal ranges and the Rocky Mountains
参考译文
无论从面积上还是从人口上讲，不列颠哥伦比亚都是加拿大第三大省。它的面积是德克萨斯的1(1/2)倍，从美加边境向北绵延800英里(1 280公里)，包括了加拿大整个西海岸及海岸线附近的岛屿。
不列颠哥伦比亚大部分地区多山，绵长而崎岖的山脉贯穿南北。即使是海岸附近的岛屿也都是一座千万年前山脉的残留部分。在上一个冰河时期，该山脉被冰川侵蚀，大半都被冲刷到海平面以下，山峰就成了目前散布在海岸附近的岛屿。
西南沿海地区属温暖湿润的海洋性气候。太平洋上的暖流使从西吹向内陆的海风变暖，因此，冬季平均气温在零度以上，而且夏季气温也不会太高。此外这温暖的西风还从海上给这一地区带来湿气。
太平洋的海风吹到内陆地区，被海岸附近的山脉和落基山脉挡住，气流沿山坡上行，温度越来越低，气流中的湿气冷凝形成降雨。因此，这些山脉西侧年降雨量高达200英寸(500厘米)。
不列颠哥伦比亚一半以上的地区森林茂密。在降雨充沛的山脉西侧，巨大的洋松高耸入云。这些森林巨人常常可高达30英尺(90米)，直径达10英尺(30米)。这些树的木材产量在北美所有树种中居于首位
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