听力原文: The climate of the west coast is the most moderate in Canada. Summers are cool and fairly dry and winters are mild, cloudy and wet. Even in mid-winter, average temperatures are usually above freezing.
The central plain from the Rocky Mountains to Great Lakes is characterized by cold winters, short but hot summers, and light snow and rain. Tile large water-surfaces of Central and Eastern Canada produce considerable modification in the climate. Southern Ontario and Quebec experience cold, damp winters and hot, humid summers.
Most of Atlantic Canada has a humid climate owing to its maritime character. Nevertheless, it experiences weather systems arriving from the dry, continental interior as well as from the sea. The combined influence of these systems creates some of the most variable day-to-day weather conditions to be encountered anywhere in Canada.
The north-central part of Canada is usually snow-covered for more than half of the year, with a frost-free period of barely two months. Rain is relatively light. Further north, on the islands along the Arctic coast and round Hudson Bay, the land. is always frozen. Average temperatures stay above freezing for only a few weeks of the year. The Arctic Islands and the northern border of the mainland do not have a summer season of the kind known in Southern Canada.
(33)
A.The Arctic coast.
B.The west coast.
C.The east coast.
D.The central plain.
第1题
临床上犬剖腹产手术时,切开子宫的最佳部位是()
A、子宫角背侧
B、子宫角腹侧
C、子宫体背侧
D、子宫体腹侧
E、子宫颈
第4题
犬剖宫产术时,子宫切开的最佳部位为()
A.子宫角腹侧
B.子宫体腹侧
C.子宫角背侧
D.子宫体背侧
E.子宫角大弯
第10题
子宫内膜癌的发生部位以下列哪项为多见
A.子宫颈内口
B.子宫体部
C.双侧子宫角附近
D.子宫后壁
E.子宫前壁
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