【简答题】Microwave oven uses electromagnetic wave to heat food. Suppose the space inside the oven can be treated as free space. If the electric field at point P in the oven is measured to be 【图片】, then the mag...
【简答题】P118 • Task 3 Fill in each blank by finding a proper word or phrse in the paragragh given in the right form. • 1. Business is good at the moment, but there are one or two problems _ .(para. 1)