如图所示，小华用刻度尺测量某铁棒的长度，该刻度尺的分度值是____ ，测量的结果应为____ cm．

    “What is the most important part of your body?” My mother asked me a question one day. “Sound is very important to us, so it's my 1 , Mommy.” I answered.

    She said, “No. Many people 2 deaf(耳聋的), but they can live by themselves and even work. You can think 3 it and I will ask you again.”

    My  grandfather  died  last  year.  When  everyone  was  crying  to 4 goodbye  to  him,  my  mom  asked  me the 5again.

    I didn't understand her, so I asked her, “It is a game 6 you and me?” She looked into my eyes and told me, “You know, it shows how you live 7 life.” She said with tears, “My dear, the most important body part is your shoulder(肩膀).”

    I asked, “Is it because it holds up my 8 ?”

    She replied, “No, it is because it 9 hold the head of a friend or loved one. 10needs a shoulder to cry on.”

如果两个数的和为0，那么这两个数 （  ）

如图是一些常见的单质、化合物之间的转化关系图，有些反应中的部分物质被略去．常温常压下，B为红棕色粉末，A、C为金属单质，I为黄绿色气体．请回答下列问题：