题干

中国女科学家屠呦呦获2015年诺贝尔生理学奖或医学奖.她研制的抗疟药青蒿素挽救了数百万人的生命.青蒿素是从植物黄花蒿的组织细胞中提取的一种代谢产物,其作用方式目前尚不明确,推测可能是作用于疟原虫的食物泡膜,从而阻断了营养摄取的最早阶段,使疟原虫较快出现氨基酸饥饿,迅速形成自噬泡,并不断排出虫体外,使疟原虫损失大量胞浆而死亡.下列论述不正确的是(    )

A:疟原虫对外界食物的获取方式主要是胞吞,体现了细胞膜的流动性

B:细胞质是细胞代谢的主要场所,如果大量流失,会威胁到细胞生存

C:疟原虫寄生在寄主体内,从生态系统的成分上来看,可以视为分解者

D:在植物黄花蒿中提取青蒿素治疗疟疾二这体现了生物多样性的直接使用价值

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答案(点此获取答案解析)

C

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    More than anything else in the world, Lion liked being King of the jungle.  He walked around, showing off his power and pride.

    Each day Lion took a long lazy sleep under the shade of his favorite tree.  He always dreamed of weaker animals bowing(鞠躬) before him.

    One day Mouse ran through the jungle and tripped over Lion's huge paws.  Lion woke up with a start. “How dare you wake me up!” he shouted angrily. Lion grabbed(抓住) Mouse with one paw. “On the second thought, I'm in the mood for the snack, and you'll make a delicious meal.” he said.

    Mouse cried out, “King Lion, please spare(饶恕) me! If you let me live, I'll always remember your kindness.  And, some day, I might be able to help you.”

    “How could such a powerless little mouse ever help me?” That thought made Lion laugh so much that he decided to let Mouse go.  A week later, Lion was walking through the jungle on the way to his favorite tree when he stepped onto a hunter's net.  The net scooped him up. No matter how he twisted (扭动) and turned, he couldn't escape.

    When Mouse heard Lion's frightened shouts, he raced to help. Mouse quickly chewed(咬)through the ropes to make a hole in the net.  Soon, Lion moved out and was free. Lion looked down at the little mouse. “Thank you for saving my life,” said Lion, smiling his widest smile.  “I was mistaken.  You are not a powerless little mouse. You are a great friend!”