题目

完形填空（共20小题，每小题1.5分，满分30分）        When she was seven, we found out that Jenny had a few problems. Several ___36___ and many speech classes later, we found out that besides hearing, she also had Juvenile Rheumatoid Arthritis（幼儿类风湿性关节炎）.        She could not put ___37___ on the heels of her feet, so she walked on tiptoe and when the pain became unbearable, I carried her.        All ___38___ grade school, and on into high school, Jenny suffered, yet never complained. She ___39___ a smile on her face, a song on her lips, an（2分）在测量大气压的实验中，为消除活塞与针筒间的摩擦力对实验的影响，某同学采用了图示装置，将注射器筒固定在水平桌面上，把活塞推至注射器筒底端，用橡皮帽封住注射器的小孔，活塞通过水平细线与烧杯相连，向烧杯中缓慢加水，当活塞刚开始向左滑动时，测得杯中水的质量为880g；然后向外缓慢抽水，当活塞刚开始向右滑动时，测得杯中水的质量为460g，烧杯质量为100g，活塞面积为7×10﹣5m2，g=10N/kg轮轴间的摩擦和细线重不计，则所测大气压的值应为（ ）A． 1.26×105Pa B． 1.10×105Pa C． 1.01×105Pa D． 0.96×105Pa