下面关于铁的说法正确的是（）

A.血红素铁主要存在于动物性食品中

B.血红素铁在肠内的吸收受膳食因素影响较小

C.非血红素铁主要存在于动物性食品中

D.无论血红素铁还是非血红素铁均受植酸盐、草酸盐的影响

E.铁的吸收与体内铁的需要量有关

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I read an article about London in a m   小题1:   yesterday.

London is one of the c   小题2:   with a long history in Britain. It is also the biggest  city in Europe. You can find some of the best theatres of the world there, such as the National Theatre, the National Gallery(画廊) and so on. You may visit many places of i   小题3:  there. Most of the old and f  小题4:  buildings are on the n  小题5:  bank of the River Thames. On the south bank, there are some fine modern  buildings.

If you want to know the people there better, you should learn more about the history and the culture as well.