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【简答题】
阅读资料,并回答问题。 资料一:松鼠是杂食性动物,一般以果实、昆虫、鸟卵等为食。天然林中食物网复杂,使得松鼠食物来源丰富,而鼬科动物、猛禽及蛇等常常攻击捕食松鼠。图为森林生态系統中与松鼠有关的部分食物网示意图。 资料二:1990年,浙江省浦江县将天然林改造为经济树种柳杉林。改造后,原生态系统的物种逐渐退化,动植物种类单一,松鼠天敌因迁移而减少。最终松鼠泛滥,人工林的树皮被大面积啃食。 (1)天然林给松鼠提供________,同时松鼠的生存又受________的制约,这使得天然林中松鼠的数量和比例能维持在稳定的范围之内,这种现象称为生态平衡。 (2)根据上图,人工改造天然林该食物网中数量最先大量下降的是________;苍鹰离开,直接原因是________的数量减少。 (3)由资料二可知,该地物种多样性的破坏,根本原因是破坏了__________________________。
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【单选题】How did Sarah seem to feel about the ghosts?
A.
The house was haunted because of the way the family had achieved its wealth.
B.
The house was not really haunted, but stories about ghosts helped the house to become famous.
C.
The house may have been haunted, but she did not understand why.
D.
She made up stories about the house being haunted to get sympathy.
【简答题】A．The corridor was widened. B．The house was rewired. C．The smoke alarms were installed. D．The front door can be opened automatically.
【简答题】It was only 5 o’clock in the morning. The house was quiet and Tim' s mother was still asleep. Only the sound of the big freezer broke the quiet. He’d dreamt of the cave last night. The purring (轻微颤动声)...
【单选题】In the sentence 'When the policeman arrived, the house was found broken into', the italicized part is a(n)______.
A.
object complement
B.
subjective complement
C.
object
D.
appositive
【简答题】The house was quiet at 5 am and Tim’s mother was asleep. Only the sound of the big freezer broke the quiet. He’d dreamt of the cave last night. The purring（轻微颤动声）of the freezer had been the sea. Tim p...
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