V.閲讀測驗(第26題至第30題,共10分) To toot, to cut the cheese, or to pass gas. These are all funny ways to talk about something that everyone does:Farts! A normal person passes about half a liter of gas a day. That equals about 14 farts per day. Lots of people are embarrassed by farts, but there is no nced to be. The first step is to admit that you do it. After you face up to this fact,then you can really enjoy learning some interesting facts about farts. First of all, let's look at where farts come from. There are several sources of fart gas. We get fart gas from the air we swallow. Gas also goes into our intestines from our blood. In addition, gas is also produced from chemical reaction and bacteria living in our intestines. Nervous people usually have more gas. This is because they swallow more air. In addition, food goes through their digestive systems faster. This means that the oxygen cannot be absorbed from the food quickly enough. Therefore, oxygen natually in the food goes into the intestines and becomes fart gas. Another interesting fact is that a person's diet affects the stinkiness of farts. The stinkiness of a fart has to do with a certain chemical in food. Foods with a lot of sulphur in them, such as eggs, meat, and cauliflower, cause stinkier farts. Beans cause a lot of farts, but these farts aren't usually really stinky. Beans aren't high in sulphur. However,they do contain a lot of sugars that bacteria in the intestines love. The bacteria eat the sugars and produce gas. Finally, people wonder, "Where do farts go when you hold them in? Are these held farts harmful?"' Well, these farts will not poison you. However, you may get a bad stomachache from the pressure. Farts that you hold in are neither released nor absorbed. They move back up into the intestine and sooner or later come out. They are not lost, just delayed. So now that you know some facts about farts, be proud of yourself and say, "'Yes, I cut the cheese!" 【題組】26. What is the main idea?
(A) Dangers of farts (B) Jokes about farts
(C) Myths about farts (D) Things to know about farts
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