如图所示，有一水平方向的匀强电场，场强大小为9000N/C，在电场内一水平面上作半径为10cm的圆，圆上取A、B两点，AO沿E方向，BO⊥OA，另在圆心处放一电量为10^﹣8C的正点电荷，则A处场强大小E_A为零．____ （判断对错）

用下列词语造句。

①故人

②孤帆

如图为人体内某结构（或器官）的血液流动情况示意图，B代表某结构或器官，A、C代表与其相连的血管，箭头代表血流方向，请据图回答：

（1）若B表示肺部毛细血管，则血管A的名称是____ ，血管C中____ （填二氧化碳或氧气）的含量明显高于血管A．

（2）若B为组织细胞，血管C比血管A血液中的二氧化碳含量____ （填低或高）．

（3）若A血管血液中氧的含量高，营养物质含量低，C血管血液中氧的含量低，营养物 质含量高，则B的名称是____ ．

（4）若A代表静脉血管，C代表动脉血管，B代表血液循环的动力器官，则B的名称是____ ．

I have two friends. They are Bob and his sister Amy. Look! Bob

has a white T-shirt. He is not tall but fat. He is 10 years old.He

can ride a bike. Amy is the girl. She has a red skirt. She likes red

very much. She can fly a kite. She is 9 years old.

Oh! Look! The boy is me. I have a big mouth and long hair. I am

10 years old. I like swimming. I can swim very well. The little dog

is my friend, too. He can run and jump. He has big ears and a big

mouth. He is cute (可爱). I love him.

5____2×2

8____4×2