在吸光光度中，影响显色反应的因素有哪些？（） A.溶液酸度 B.显色剂用量 C.显色

阅读理解

       The sun was shining as Kevin walked to the old bench(长凳) where he met Mike every afternoon

after school. They were good friends and loved to play football. They didn’t have enough money to buy

a real football, but Mike had made a ball out of old socks covered with a piece of plastic. It wasn’t

beautiful, but it worked well. The two friends didn’t stop kicking and running until very late.

       The next afternoon, Mike and Kevin met again at the old bench. Soon the home-made ball was

spinning(旋转) across the grass as the boys laughed and shouted happily. The ball was stopped by a

boy wearing a nice pair of sneakers(运动鞋). Kevin was upset when he saw it was Steven.

      The next morning, Kevin’s mother gave him an envelope(信封). “Your uncle sent you a birthday

present,” she smiled. Kevin’s eyes grew big when he saw the $100 bill. Later that day, a pair of new

sneaker lay next to his chair, and in the corner, a real football.

      The next afternoon, Steven invited Kevin to play football on the field next to the library. Steven did

not want Mike to join them only because Mike’s sneakers were dirty and he was not good at football.

When the game was over, Kevin and Steven walked past the old bench where Mike was sitting. Steven

picked up a stone and threw it at him. Kevin, holding his new football in his hands, walked on and did

not look back.

     One afternoon, as Kevin walked past the old bench, he saw something lying under it. He looked

closer and saw it was the home-made ball. Kevin was full of sorrow at the sight of his old home-made

ball, and he let out a sad sigh(叹气). As his sadness turned to anger, he picked up his new football and

kicked it into the air. Kevin kicked it so hard that it flew past the library and over the school gate. Then

Kevin walked to the bench and picked up his home-made ball. Holding it in his hands, Kevin sat down

and waited.

1The best title for this passage is ______.      

A.A Home-Made Football                 

B. Playing Football      

C. Two Close Friends                     

D. A New Football

常用的态度与品德的培养方法有哪些？

Distributioncenter，可翻译为（）

A、物流中心

B、配送中心

C、加工中心

D、流通中心

半导体静态RAM靠______存储信息，半导体动态RAM靠______来存储信息。

（）是项目区别于其他活动（任务）的基本特征

A.一次性

B.目标明确性

C.整体性

D.生命周期属性