生物既能适应环境，也能影响环境．下列能反映生物影响环境的是（  ）

    I was sitting in the far back in a pizza house when I noticed the man, about thirty years old, carrying a pizza box. He sat down at the table to my right and then 1 his large dirty paper bag of clothing down on the floor. Obviously, this man was homeless and 2 a bath. He picked up the one small slice（薄片）of pizza and very slowly, very carefully, he began to eat, taking very little 3.

    He finally finished his meal and did something that I would never 4. He turned the box on its corner and slid the few5bits into one corner. Then he 6 his index finger（食指）and tried to pick up the small bits.

    Oh, how much it hurt me once again to see myself 7 I was thirty years ago. No food, no 8, and no clean clothes. Most of my past life had always been 9 to that of the young man and it all came back to me 10. The muscles in my neck began to tighten and my eyes began to burn and water up. I coughed a bit, trying to clear my 11 and get myself back together.

    I got four large slices of pizza from the counter and sat them down on his table, saying, “I thought you 12 like to have a few slices.”

    I did not stop at all but walked around behind him. As I passed him, I reached out and13him on the back, just one time, very softly with my hand. I hope that man knows that someone, someplace,14 him as a human being. And I am so 15 that I have never forgotten what it feels like to be down, out, dirty and hungry.

1.8g某金属在氯气中燃烧后，质量增加了7.1g，该金属是（　　）

某病人经常出现糖尿，经过医生检查，不属于内分泌腺的问题，那么他的病变部位很可能在（ ）