题目

Welcome to the 2012 LondonOlympic Games!ArcheryArchery has a 10,000 yearhistory, when bows and arrows were first used for hunting and war.Archery first appeared at theParis Olympics of 1990. It was removed after 1908 and only returned to theOlympics at Munich in 1972.Did you know?In the 14th century, archerywas so important that as English law required every man, aged seven to 60, topractise it.BadmintonThis sport was invented byBritish soldiers in India who called it Poono, the same name as the town inwhich they lived.It was first played at theOlympics in 1992 at Barcelona. Although the rules在一定范围内，增加作物的种植密度扩大叶面积，产量增加。但密度过大，叶片相互重叠， 株间透光率降低，产量则会降低。如图表示叶面积指数（指单位土地面积上植物的总叶面积）与光合作用和呼吸作用强度的关系。根据图形信息判断下列叙述错误是（ ）A.叶面积指数越大，农作物的产量越高B.叶面积指数超过 9 时，农作物会减产C.A 点时，光合作用强度等于呼吸作用强度D.叶面积指数大约为 5 时，对农作物增产最有利