Different places have different foods. South Korea is a rich country in A____ Seoul (首尔) is its capital city. It was called Hanyang a long time ____ Tian'an is an important city in ____(west) South Korea. You can____(taste)many kinds of fruits, such as sweet pears and grapes there. You can also eat some delicious food,____ (especial)cold noodles and pickles(泡菜). In China, there is a lot of____(interest)food. For example, in Beijing, it is ____(truly) that you can eat Beijing Duck. It's a Chinese t____ .It ____(take)a lot of work. If you want to know more about food, you can go o____to fin it.

关于声现象的说法正确的是（　　）

将电动势为E的电源接入电路中，非静电力需要做22.8J的功才能将6C的正电荷从电源负极搬到正极求电源电动势E。