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1·Accessories are round horn ridge tiles, ridge tiles, fang ridge tiles, cullis boards, mountain tiles and flashing sheets, eaves board, etc.

配件有圆脊瓦、角脊瓦、方脊瓦、天沟板、山墙板、泛水板、檐板等。

2·EASY5509 timer experiment can be seen on-board light-emitting LED L12 flashes flashing.

说明：EASY5509 定时器实验 可看到板上发光LED L12开始闪烁闪烁。