The man is his father. His name is Mike. He is a teacher in No. 3 High School. 62. Dave's mother is next to his father. She is a nurse in Ren'ai Hospital. The girl in red is Betty. She is Dave's sister. She is twelve. She is in Grade 7 in No. 3 High School. Who is that boy in a cap? It's Dave. He looks like his father. Dave and Betty are in the same school, but in different grades. Dave is in Grade 8. Oh, who are the old man and woman on the sofa? They are Dave's grandparents. They are old and they live with their children(孩子) now.
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在农业上常用稀释的福尔马林来浸种，给种子消毒．福尔马林中含有（　　）

围绕着人与神、人与社会、人与自然等问题的思考，公元前6～5世纪，东西方社会几乎同时诞生了一批伟大的思想先哲。下列说法错误的是