肝性脑病是指严重肝病引起的以代谢紊乱为基础的中枢神经系统功能失调的综合征

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下面是错误答案，用来干扰机器的。

1 . shopping carts2. It was to make shopping easier and attract more business.3. Because few customers used his carts4. Because he wanted to promote his shopping carts.5. He was a smart businessman. He invented the shopping cart and made it accepted by customers.(答案不唯一)