开题报告怎么写啊?题目:单片机控制的逻辑无环流可逆直流调速系统设计

The snail in the bottle case

The case concerned the purchase of a bottle of ginger beer by a friend of the plaintiff(Donoghue).The ginger beer was sold in an opaque(unable to be seen through)bottle.After drinking some of the ginger beer directly from the bottle,the plaintiff poured the remaining contents of the bottle into her glass.She discovered what she took to be a decomposed snail in the ginger beer.After seeingthis ,she became ill. While seeing her lawyer in relation to another matter,she mentioned her experience and was advised that it might be possible to sue the manufacturer even though neither she nor the manufacturer was party to the original contract involving the purchase of the ginger beer.(The original parties to the contract of sale were the person who bought it and the shopkeeper who sold it