（3x+2）（﹣x⁴+3x⁵）+（3x+2）（﹣2x⁴+x⁵）+（x+1）（3x⁴﹣4x⁵）与下列哪一个式子相同（　　）

如图为物质出入细胞膜的示意图，请据图回答：

如图所示是一演示实验的电路图。图中L是一带铁芯的线圈，A是一灯泡。起初，开关处于闭合状态，电路是接通的。现将开关断开，则在开关断开的瞬间，通过灯泡A的电流方向是从____端经灯泡到____端。这个实验是用来演示____ 现象的。

bike red have I a

____

阅读理解B
Paul：Good morning, Alan．
Alan：Good morning, Paul．Look at that boy．I never(从未)saw him before．
Paul：The boy in the blue jacket?
Alan：No. The boy is in red．He is playing baseball．
Paul：Oh, he is a new student in my class．His name is Mike Smith．
Alan：He plays well!
Paul：Yes, he is on the baseball team(队). His father is good at it, too．
Alan：Is his father a baseball player(运动员)?
Paul：No, he is a doctor．
Alan：What about his mother?
Paul：His mother is an English teacher in our school. She is nice．
Alan：When did they come to Shanghai'?
Paul：Last month. They will live here for a year and then go to Beijing．
Alan：You know a lot about Mike．
Paul：Yes. We' re good friends．
根据材料内容选择最佳答案。