To save time, many Americans buy foods which can be quickly made ready for the table. On holidays, families enjoy delicious meals. For example, on Thanksgiving Day, the fourth Thursday in November, family members get together for a turkey dinner with pumpkin pie(南瓜派).

    People can easily find fast food chains(连锁店),such as McDonalds' and KFC, in most of the big cities in the world.

    These years, many people have taken more and more care of their health while eating. They come to know eating too much meat will make them overweight. Many of them are also worried about food addictives(添加剂). Some of them may be harmful to the body.

某同学想通过实验来探究“影响滑轮组的机械效率的因素”．他做了如图所示的实验，并测算了各次实验装置的机械效率．关于他的实验过程，下列说法中不正确的是（　　）

光明小学四、五、六年级男、女生人数统计图：

下列农作物或农产品不是盛产于南方地区的是（　　）

登平嵩阁右嵩亭作

文彦博^①

不较平嵩与右嵩^②，大都亭阁画穹崇。

太行太室^③当前后，俱是家山入望中。

【注】①文彦博（公元1006－1097年），字宽夫，汾州介休（今属山西）人。仁宗天圣五年（公元1027年）进士。历官殿中侍御史、转运副使等职，出将入相五十余年，为北宋名臣。谥忠烈。②平嵩阁、右嵩亭，均为嵩山上的建筑物。③太行：山名，绵延山西、河北、河南三省界的大山脉。太室：即五岳之一的嵩山，在今河南登封县北。东称太室，西称少室。