下列都属于真菌的一组是（    ）

①大肠杆菌 ②银耳 ③金黄色葡萄球菌 ④灵芝 ⑤曲霉 ⑥空肠弯曲菌 ⑦酵母菌．

人体能够依靠自身的调节能力对外界刺激进行灵敏地感知．请回答下列有关人体调节方面的问题：

某一时期，欧洲人为年轻人制定了新标准：他必须谈吐敏捷，必须精通体育和武艺，必须懂得跳舞并会欣赏音乐。他应该懂得拉丁文和希腊文。新标准产生的直接原因是（    ）

《韩非子·物权》中说：“事在四方，要在中央，圣人执要，四方来效”。秦始皇所采取的措施中，最能体现“要在中央”政治构想（   ）

   Hi, everyone! My name is Wang Kai. I’m twelve. I’m in Class 5 Grade 7. Teachers’ Day is coming. I want to give some presents to my teachers.

   Miss Zhang is my English teacher. She is twentyfour years old. She likes flowers very much. I want to give her some flowers from my garden. My Chinese teacher has a fouryearold son, Li Xin. He likes playing football a lot. I want to give my Chinese teacher a “special” present: playing football with Li Xin for a day! What about my maths teacher Mr. Zheng? He likes drawing pictures. I would like to draw a picture of him and give it to him.

   My friends, what presents do you usually give to your teachers? Please tell me!