问题
单项选择题
下列有关食物链和食物网的叙述，正确的是（）
A.食物网由许多相互独立的食物链构成
B.在捕食食物链中，各营养级获得能量的方式基本相同
C.食物网越复杂，生态系统受到干扰时恢复原状的能力越强
D.在食物网中，一种生物可能属于不同的营养级
答案
参考答案：D
搜题请搜索小程序“爱下问搜题”
下列有关食物链和食物网的叙述，正确的是（）
A.食物网由许多相互独立的食物链构成
B.在捕食食物链中，各营养级获得能量的方式基本相同
C.食物网越复杂，生态系统受到干扰时恢复原状的能力越强
D.在食物网中，一种生物可能属于不同的营养级
参考答案：D
Early one morning, I witnessed romance at one the least-expected places in the world—a room in a rest home. At the time, my father 36 a room with three other gentlemen. Before my daddy lived in the rest home, an elderly 37 was sent there. Since there wasn’t a double room 38 , they were forced to separate the couple. The gentleman, Mr.West, was 39 in the bed beside Daddy. His wife, Mrs.West, shared a room with several other ladies down the hall. When I went to see Daddy that morning, I 40 Mr.West. Three employees were working with him. He hadn’t eaten a bite of food 41 he was sent several days earlier. I could 42 by the expression on the nurses’ faces that they were worried about him. Mr.West 43 to open his mouth for any of them. “Go and get Mrs.West, ” the nurse told her helper. “Maybe Mr.West will eat 44 her. ” In a few minutes a kind-looking lady was 45 into the room. Her smile was contagious（传染的）and Mr.West smiled 46 . I felt as though I was intruding（侵入）on a 47 moment, but I couldn’t take my eyes off the couple. The love between them was obvious, as Mrs.West patted Mr.West’s hand. With a soft voice, Mrs.West tried to 48 Mr.West to eat. To everyone’s surprise, Mr.West 49 his mouth and began to enjoy the 50 and his wife’s company. While the nurses fed him, he stared at his sweetheart with a smile on his face. Mrs.West began singing a song for him. The 51 on his once solemn（严肃的）face became even brighter. Tears 52 my eyes. The nurse then 53 the curtain around the couple to give them some quality time alone. I discovered that 54 doesn’t only exist when we’re young and in love. Romance 55 a lifetime and grows stronger with age.
|