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  3. Some living creatures may【B1】______the effects of cold by moving elsewhere (

Some living creatures may【B1】______the effects of cold by moving elsewhere (

游客2024-02-28  37
问题     Some living creatures may【B1】______the effects of cold by moving elsewhere (e. g. birds, fish) or by【B2】______movement (e.g. bees). Others may die when the cold weather【B3】______(e. g. land insects). Many mammals【B4】______the winter through the process of hibernation (from the Latin word meaning winter). One type of hibernation is known as【B5】______hibernation. This is brought about by the activation of a【B6】______called H. I.T.  in the animal’ s blood. The temperature of the animal falls and metabolism is【B7】______The respiratory and heart (beat) rates【B8】______dramatically and the temperature falls【B9】______. However, the animal will be awakened by  a special control system if it is danger of freezing and may also wake for a  short to excrete waste substances or to eat.【B10】______. Energy is provided at the end of hibernation by the animal’ s store of brown fat. Some creatures do not actually hibernate, but enter a state of torpor. They show similar metabolic changes,  【B11】______. [br] 【B3】
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