题目

Thirteen years ago,I fell in love with a white ball of fur that wagged its tail at me.I was about to_41_a steady job to follow my dream of becoming a travel_42_,which would possibly make my life harder—not to mention_43_ an animal that would need care during my long absence._44_I never gave it a second thought.She had me at the first wag. Layla was good at conveying her displeasure with her body language every time I_45_.But her_46_at my departures was more than compensated for by our reunions.And when I sat to write my_47_,she would settle herself next to my desk.I would _48_to her 人体的运动系统是由骨、骨连结、骨骼肌三部分共同组成的。骨骼肌在运动中的作用是A. 支点B. 连接C. 动力D. 杠杆