题目

People do not analyse every problem they meet. Sometimes they try to remember a solution from the last time they had a 1 problem. They often accept the opinion or ideas of other people. Other times they begin to act without 2 ;they try to find a solution by trial and error. 3 ,when all of these methods 4 ,the person with a problem has to start analysing. There are six 5 in analysing a problem.6 the person must recognise that there is a problem. For example,Sam’s bicycle is broken, and he cannot ride it to class as he usually does. Sam must 7 that there is a problem with his bicycle.Next the 如图所示线圈两端接在电流表上组成闭合回路。在下列情况中，电流表指针不发生偏转的是  （    ） A．线圈不动，磁铁插入线圈                B．线圈不动，磁铁从线圈中拔出 C．磁铁不动，线圈上、下移动              D．磁铁插在线圈内不动