题目

阅读表达  阅读下面短文，回答问题 Frank is my friend. His family is rich. His parents always give him lots of pocket money. But Frank thinks his parents work very hard and it’s not easy for them, so he always tries his best to save(节约) money. He has some good ways to do it.  Frank likes reading. He has lots of books. He tells me he often buys books online, because they’re cheaper. And when he has free time, he goes to bookstores or libraries to do some reading.  Frank has a bike. He usually goes to school by bike. Sometimes when it rains or snows, he walks. Th如图是“探究串联电路电流特点”的实验电路图：（1）实验中，选择两个小灯泡的规格应该是不相同不相同的（填“相同”或“不相同”）． 电流表的位置 a b c 电流I/A 0.3 0.3 1.5（2）表是某同学在实验中测得的数据：指出上述表格所记录的数据中，明显错误的数值是1.5A1.5A，造成错误的原因是用了较小的量程，而读数时却误读了较大的量程用了较小的量程，而读数时却误读了较大的量程．（3）实验的不足之处是：只做一次实验，得出结论有些特殊只做一次实验，得出结论有些特殊．（4）实验的改进方法是：换几个不同的小灯泡，再做几组实验，然后得出结论换几个不同的小灯泡，再做几组实验，然后得出结论．（5）甲、乙两位同学在分组实验中，闭合开关前，他们的电流表指针均指在零刻度处． 当闭合开关试触时，发现电流表指针摆动分别出现了如图甲、乙所示的三种情况．请分析他们在电流表的使用上分别存在什么问题，会发生什么危害，请写在下面．甲存在的问题：电流表正负接线柱接反了电流表正负接线柱接反了危害是：损坏电流表损坏电流表；乙存在的问题：量程太小量程太小．