The computer is naughty again, maybe the driver is broken, and the mouse and keyboard often fail. It's too slow to write with the built-in keyboard, plus the damn Netcom cable doesn't work, and the power goes out at night, so it's too late. I had to take this chapter to Sunday to make it up. (On Saturday, Xiaobai still has to go to a part-time job)

The classes for the new semester are full, but luckily there is no late self-study (thankfully) ← ←

Everyone's forgiveness!