Weallknowweshouldn’teatdirt,butwedoitanyway.Mostlynoto...

问题详情：

 We all know we shouldn’t eat dirt, but we do it anyway. Mostly not on purpose--- dirt gets into our bodies all day, every day, whether we want it or not. It’s understandably difficult to figure out exactly how much is getting in, but that might be beside the point.

We get our daily dirt in all kinds of ways, from polluted food, dust taking in because we work in the open air, and from not washing our hands before eating. The Environmental Protection Agency (EPA) has done a large amount of research on dirt consumption. About 45 percent of the things we take in or unintentionally（无心地）eat is soil, and 55 percent is dust.

 A study reports that babies from 6 weeks to 1 year old generally get 60 milligrams a day. From ages 1 to 20, that amount goes up to 100 milligrams a day. If you take those daily numbers and make them annual (每年的), that would be 36,500 milligrams a year.

Kids, as we all know, just love eating dirt, especially between the ages of 1 and researcher said that although childhood dirt-eating certainly is based on being curious about the world and the ability to play, it could also be an effort to get some vitamins and minerals. However, in many other cultures, it’s not so strange for adults to eat dirt. Some pregnant(怀孕的) women in sub-Saharan Africa eat dirt to comfort stomach upsets during morning sickness or to add extra nutrients to their body.

So while there’s concern about polluted food and soil, maybe we don’t need to worry so much about dirt consumption. It's only natural, right?

29．You unintentionally eat soil and dirt in many ways except that ___________.

A．you don’t wash hands before eating             B．it is dry in your home

C．you don’t clean vegetables before cooking   D．you work as a policeman in the street

30．From the text, we can tell that ________.

A．babies of 5 weeks old will never take in any dirt

B．it’s very easy to figure out exactly how much dirt we eat

C．if a baby is 10 months old, it will take in dirt around 21,900 milligrams annually

D．no matter how much dirt you consume, it is good for your body

31．The reason why kids love eating dirt may be that they ________.

A．like dirty items                      B．feel it will help them make friends

C．enjoy the taste of dirt                        D．want to explore something new

32．It can be inferred from the passage that______.

A．it is necessary to make young people eat dirt

B．it is healthful to eat some dirt

C．it is dangerous for a pregnant woman to eat dirt

D．it doesn’t matter to eat some dirt

【回答】

BCDD

知识点：阅读理解

题型：阅读理解