题目

阅读下面材料，根据其内容和所给段落开头语续写两段，使之构成一篇完整的短文。续写的词数应为150左右。 'Usual boring day!' This would be the answer from Roman if somebody asked him how his day was. These days he found everything boring, nothing excited him.One day he was lying in his room as usual. Suddenly light went off. His room was rather hot without an air conditioner. Though he did not want to leave his room, he had to. Unwillingly, he left his room and came to living room. Living room was slightly cool as it had two huge windows. His you2．若“!”是一种数学运算符号，并且：1!=1，2!=2×1=2，3!=3×2×1=6，4!=4×3×2×1，…，则$\frac{51!}{49!}$=2550．