阅读下列材料冋答问题．

靑霉素是靑霉菌在代谢过程中产生的能够抑制细菌生长的广谱抗生素，尤其是对革兰氏阳性菌生长抑制明显，靑霉素抑制细菌生长土要表现在它能够抑制繁殖期细菌细胞壁的合成，使之成为球形体而破裂溶解从而杀死细菌．就上述材料，结合你学过或了解的知识，冋答下列各题：

如图所示，甲图是人体心脏剖面图，乙图是人体某处局部血管示意图，请居图回答以下问题：

B

    It is Saturday. The Browns are at home. Mrs. Brown is in the kitchen. She's making apple pies.

    The pies are very delicious. Do you want to have a taste? Mr. Brown isn't in the living room. He is in front of the house. He is washing his car. The car is new and very beautiful. So he looks after it very well. Jim is in the garden. He is playing football with some other boys. Where is Jim's sister, Sue? She's in her bedroom with her friend, Ann. They are watching TV. Who is the little boy under the tree? It's Bob. He is playing with the lovely cat.

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