Công nghệ Lớp9

Grade9 Technology is the best textbook app
Lesson 1 Introduction to the profession of civil electricity Lesson 2 Electrical materials used in installing electrical networks in the house Lesson 3 Tools used in electrical network installation Lesson 4 Practice: Using electricity meters Lesson 5 Practice: Connecting wires electricity Lesson 6 Practice :Assembly circuit of electric board Lesson 7 Practice: Install circuit of fluorescent tube Lamp Lesson 8 Practice: Install circuit of two switches that control two lights Lesson 9 Practice: Install a two-way electrical circuit three-pole switch controlling one light Lesson 10 Practice: Installing a circuit of a three-pole switch controlling two lights Lesson 11 Installing the wiring of the home electrical network Lesson 12 Checking the safety of the home electrical network Summary and review