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Tác hại, nguy cơ khi dùng Internet:

1. - Thông tin cá nhân bị lộ hoặc bị đánh cắp.
2. - Máy tính bị nhiễm virus hay mã độc.
3. - Bị lừa đảo, dụ dỗ, đe dọa, bắt nạt trên mạng.
4. - Tiếp nhận thông tin không chính xác.
5. - Nghiện Internet, nghiện trò chơi trên mạng.

Quy tắc an toàn khi sử dụng Internet

1. - Giữ an toàn.
2. - Không gặp gỡ.
3. - Đừng chấp nhận.
4. - Kiểm tra độ tin cậy.
5. - Hãy nói ra.

Con Khong Biet

Trong qui trình nấu ăn, có thao tác: "Thêm một chút muối vào món ăn." Hướng dẫn này không rõ ràng vì "một chút" là một lượng không xác định. Mỗi người sẽ hiểu "một chút" theo một cách khác nhau, dẫn đến kết quả khác nhau.

Con Khong Biet

AX+B=0

X=0

L-R=0

-Đầu vào: Điểm xuất phát, điểm đến.

-Các bước: Xác định vị trí, tìm đường, di chuyển theo chỉ dẫn.

Đầu ra: Đường đi tối ưu

Hướng dẫn giải:

- Đến gần vị trí dây dẫn điện bị đứt, rơi xuống đất.

- Thả diều ở nơi có đường dây điện đi qua.

- Chạm tay trực tiếp vào dây điện trần hoặc dây điện bị hở cách điện.

- Vi phạm hành lang an toàn trạm điện.

- Dùng vật liệu kim loại chạm vào nguồn điện.

- Chạm vào đồ dùng điện bị rò điện qua lớp vỏ kim loại bên ngoài.