题目

A high school history teacher once told us, “If you make one close friend in school, you will be most fortunate. A true friend is someone who stays with you for life.1 teaches that he was right. Good friendship is just not easily 2It is possible that we simply do not stay in one place long enough food 3friendship to4. However, there can be5disagreement on the need for each of us to think carefully about the kind of friendship we want. To most of us, friendships are considered very important, but we need to have clear in our 6 the kinds of friendship we want. Are they to be close or7at arm's下面图所示实验中哪组是电磁感应定律实验装置 [     ] A．甲B．乙C．丙D．丁