Thomas Edison ______ made 1,093 inventions in his life, was one of the greatest inventors.
根据短文内容，完成下列各题。
Andy is studying in a school. On Monday and Friday, he has P.E. class. On Tuesday, he has music class and English corner. On Thursday afternoon, he goes to the library. On Sunday morning, he plays football with friends. On Saturday he watches TV and help mom.
小玲家养了46只鸭子，24 只鸡，鸡和鹅的总数比鸭少5 只，则鹅为多少只？
②把定值电阻R2换成R3，调节滑动变阻器使电流表A1的示数为____，使R3两端的____不变．记录此时电流表A2的示数为I3；
