更多"The winter sleep is a very singular"的相关试题:
[单项选择]The winter sleep is a very singular property of animals and plants. And, though it occurs daily before our eyes, we are not able to explain all the (67) with which it is attended. In cold countries, many animals, on the (68) of winter, retire to their subterraneous abodes, in which they (69) themselves under the snow, where they remain five or six months without nourishment or motion; nay, almost without (70) of their blood, which flows only sluggishly, and in the (71) vessels. Their perspiration is almost (72) ; but still they lose something by it, as they enter their winter quarters (73) very good condition, and are (74) thin when they return from them.
Some animals enjoy their winter sleep (75) the earth, and others are (76) beneath the snow; some for the same (77) creep into the holes of rocks, and (78) under stones, or the bark of trees.
Plants also have their winte