图是“戊戌变法”失败后谭嗣同被处死的场景。下列关于戊戌变法失败的原因的说法不正确的是(    )

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      Peru(秘鲁)is the fifth largest Latin American country with a people of 14, 430, 000. Almost half of these people live in the city areas(地区). Around Lima, there were 20% of the total (总数) population in 1961. The population here grew faster than anywhere else and in another 35 years reached 1/3 of the total population.

      About 45% of the people are Indians and 50% are white or mixed（混合人种）and the others are Asians, Negroes(黑人)or people from other countries.

      In island areas, only about half of the people can read and write, but at the places near the sea, 2/3 of the people can read and write.

若方程2x^2m+1+3y=﹣7是二元一次方程，则m=____．

液化石油气的热直高达 $4.6\times {10}^7\text{J/kg}$ ，一些不法商贩为谋取暴利，常将液化石油气与价格低廉、热值仅为 $2.9\times {10}^7\text{J/kg}$ 的二甲醚混合装入钢瓶内销售给客户．质监局对某液化石油气站销售的瓶装燃气进行检测：将质量为 $\text{100kg}$ 、初始温度为 $\text{20}℃$ 的水装入容器内，用高效炉灶燃烧瓶内燃气加热容器中的水直至 $\text{95}℃$ 恰好沸腾，瓶内燃气消耗了 $\text{1kg}$ ．通过高效炉灶，水能吸收燃气完生燃烧释放热量的 $75\%$ ．已知水的比热容为 $c_{水}=4.2\times {10}^3\text{J/(kg}\cdot ℃\text{)}$ ），求：