题干

农科所技术员研究温度对某蔬菜新品种产量的影响,将实验结果绘制成如下曲线。据此提出以下结论,你认为合理的是(  )

A:光合作用酶的最适温度高于呼吸作用酶的最适温度

B:光照越强,该蔬菜新品种的产量越高

C:阴影部分表示5~35 ℃时蔬菜的净光合速率小于零

D:温室栽培该蔬菜时温度最好控制在25~30 ℃

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D

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    Liverpool, my hometown, is a special city. It is so unique that in 2004 it became a World Heritage(遗产)Site.

    I recently returned to my home city and my first stop was at a museum on the River Mersey. Blanketed in mist(薄雾),Victorian architecture rose from the banks of the river, responded to the sounds of sea-birds, and appeared unbelievably charming. When I headed toward the centre, I found myself surrounded by buildings that mirror the best palaces of Europe. It is not hard to imagine why, on first seeing the city, most visitors would be overpowered by the beauty of the noble buildings, which are solid signs of Liverpool's history.

    As if to stress its cultural role, Liverpool has more museums and galleries than most cities in Britain. At Walker Art Gallery, I was told that it has the best collections of Victorian paintings in the world, and is the home of modern art in the north of England. However, culture is more than galleries. Liverpool offers many music events. As Britain's No. 1 music city, it has the biggest city music festival in Europe, and its musicians are famous all over the world. Liverpool is also well-known for its football and other sports events. Every year, the Mersey River Festival attracts thousands of visitors, making the city a place of wonder.

    As you would expect from such a city, there are restaurants serving food from around the world. When my trip was about to complete, I chose to rest my legs in Liverpool's famous Philharmonic pub(酒馆). It is a monument to perfection, and a heritage attraction itself.

    Being a World Heritage Site, my home city is certainly a place of “outstanding universal value”. It is a treasure house with plenty of secrets for the world to explore.