题目

Taking a Child FishingThere is nothing quite like seeing the smile on a young person’s face when they catch their fish. Here are some simple steps that can be taken to help children and parents enjoy these early fishing experiences.【1】It’s easier to teach young children to fish if your attention is towards them and not towards your own fishing. If you are also trying to fish, this can make that difficult for both of you. 【2】 When they need your help, you can hand down your tool and they can keep fishing.Keep trips short.Children have short attention periods. 【3】 Take this into 某导体电阻为20欧，通过它的电流为0.3安，10秒内通过该导体横截面的电荷量为________库，其两端电压为________伏。当该导体两端电压变为12伏时，它的电阻为________欧。