如图所示，均匀绕制的螺线管水平放置，在其正中心的上方附近用绝缘绳水平吊起通电直导线A，A与螺线管垂直，A导线中的电流方向垂直纸面向里，开关S闭合，A受到通电螺线管磁场的作用力的方向是(　　)

载体蛋白对于像____ 分子的运输却无能为力．

（Ⅰ）求f（x）在0，1上的解析式；

（Ⅱ）求f（x）在0，1上的最值．

当血液由心室泵入动脉时，心脏的心房和心室的舒缩状况是（　　）

根据短文理解,完成下了各题。

    Do you know the little boy in the picture? Let me tell you. His family name is Zou. His first name is Mingxuan. You can call him "Xuanxuan". He now lives（居住） in Hong Kong with his family.

    His father's name is Zou Shiming. He is a boxer(拳击运动员). Xuanxuan's mother is Ran Yingying. She is a host(主持人) of CCTV. Xuanxuan has a brother, and his name is Zou Minghao.

    Xuanxuan was born(出生) in 2011. Minghao was born in 2013.

In July, 2015, Xuanxuan and his father take part in the program(节目) Where are we going, Dad?(爸爸去哪儿) in Hunan TV. Many people in China like this TV program. They all like Xuanxuan because he is very cute(可爱的).