题干

甲状腺细胞可以将氨基酸和碘合成甲状腺球蛋白,并且将甲状腺球蛋白分泌到细胞外其过程如上图所示。下列叙述错误的是( )

A:若含18O的氨基酸在甲状腺细胞内的代谢过程中产生了H218O,那么水中的18O最可能来自于氨基酸的—COOH

B:细胞内的碘浓度远远高于血浆中的碘浓度,这表明a是主动运输过程

C:与c过程有关的细胞器是内质网、高尔基体、线粒体

D:与右图中③不直接相通,但膜成分最为相似的是高尔基体,用含3H标记的氨基酸注射到该细胞中,则出现3H的部位依次为①③②⑥⑤④

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D

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    "There once was a beggar who loved to hear himself sing.He lived1a dustbin next to a supermarket.He had the most amazing voice.No one would listen to him,2.Cats and dogs would come to sing along.All animals would come to hear this sound.No3though.His4audience were the animals.Even without people to sing to.the man was filled with5for he loved his voice.

    Then one day,a little girl was on her way to the supermarket.The man was singing one of his favorite songs.The little girl6him and wondered what that noise was.She began7around every corner until she found him. The girl's eyes began to grow wide as she saw the man in his8clothes.She asked him to sing,with no9of danger in her voice.This shocked the man.He sang for the girl with joy in his eyes.Although it was nice to be 10to sing,it was also nice to have an audience.He sang until they heard the girl's mother11for her.The girl quickly said12and ran off.

    The girl returned the next day and asked him to sing.13he sang for the little girl.After a few songs,she left14the call of her mother.She came the day after,with an older woman.This was the girl's15.She did not seem to mind being led behind a16dustbin.The girl asked the beggar to sing.The man sang his heart out for the17of them to hear.The mother's frown began to18and a smile began to appear.The days after were full of cheerful singing and the audience of two19,they would bring more people to listen.The beggar continued to sing until he could not sing anymore.20he loved his voice anymore.