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  3. Some people associate migration mainly with birds. Birds do travel vast dist

Some people associate migration mainly with birds. Birds do travel vast dist

游客2025-01-31  9
问题     Some people associate migration mainly with birds. Birds do travel vast distances, but mammals also migrate. An example is the caribou, reindeer that graze on the grassy slopes of northern Canada. When the weather turns cold, they travel south until spring. Their tracks are so well-worn that they are clearly visible from the air. Another migrating mammal is the Alaska fur seal. These seals breed only in the Pribilot Islands in the Bering Sea. The young are bom in June and by September are strong enough to go with their mothers on a journey of over 3 ,000 miles. Together they swim down the Pacific Coast of North America. The females and young travel as far as southern California. The males do not journey so far. They swim only to the Gulf of Alaska. In the spring, males and females all return to the islands, and there the cycle begins again. Whales are among the greatest migrators of all. The humpback and blue whales migrate thousands of miles each year from the polar seas to the tropics. Whales eat huge quantities of plankton. These are most abundant in cold polar waters. In winter, the whales move to warm waters to breed and give birth to their young. [br] Which of the following is NOT described in the passage?
选项 A、Whales migrate to breed and give birth to their young.
B、Whale-watching in Boston in summer is attracting.
C、Seals breed in the north before migration.
D、Reindeer feed on grass.
答案 B
解析 本题考查是非判断。根据文章最后一句“In winter，the whales move to warm watersto breed and give birth to their young．”第七句“These seals breed only in the Pribilot Islandsin the Bering Sea．”第三句“An example is the caribou，reindeer that graze on the grassyslopes of northern Canada．”可知，A、C、D三句在文中都有提及。只有B项在文中没有提到。所以，答案是B。
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