Hi! Welcome to my webpage. My name's Tom Wood and I'm an English teacher. I ____ (design) this webpage last week so that my students can learn more about me. I think it is important____ (know) my students well. And it is only fair____ my students know me well, too.

    I was born in London, England, but I've lived and worked in China for the past 15 years and I really like living here.

    I can speak Putonghua and even a little bit of Cantonese____ is my wife's dialect (方言). I practice____(speak) Chinese every day and I am improving____(fortunate), there are one or two million people in my town who are ready to help me with my Chinese! I particularly enjoy talking to my neighbors.

    My favourite sport is football. I play football once a week with some of the other teachers at the school. We're going to organize a(n)____ (compete) with teams of teachers from other schools this summer.

    My other great love is my motorbike. I love getting on my motorbike and riding out to the countryside. But my wife thinks it's too____ (noise )and dangerous. If anyone wants to send me an email, just____do) as you like. I'd love to hear____ you.

求$S=1+3+5+·····+101$的流程图程序如右图所示，其中①应为(    )
​

一辆沿笔直公路匀加速行驶的汽车，经过路旁两根相距50 m的电线杆共用5 s时间，它经过第二根电线杆时的速度为15 m/s，则经过第1根电线杆时的速度为(     )