题目内容
Vinegar（醋）is an old folk treatment beneficial in a long list of diseases. Some people say that it can guard against lower blood pressure, prevent cancer, destroy infection, assist in digestion and weight control, maintain memory, and protect the mind from aging.
Vinegar is said to have been used for medical diseases for at least 10,000 years. The Babylonians first made wine into vinegar in 5000 BC using date palms, grapes, and figs, and believed vinegar had exceptional curing natures. Hippocrates is said to have used vinegar as an antibiotic（抗生素）. Samurai warriors supposedly used vinegar for strength and power. During the U.S. Civil War, soldiers used vinegar to prevent stomachic upset and as a treatment for various diseases including pneumonia and scurvy. It was used to treat wounds during World War I.
The name vinegar comes from a French word meaning "sour wine." Vinegars take their name from the material used to make the vinegar, i.e., apple cider vinegar comes from apples, wine vinegar comes from grapes.
Apple cider vinegar is made by crushing apples and squeezing out the liquid. Sugar and yeast are added to the liquid to start the fermentation（发酵） process, which turns the sugars into alcohol. In a second fermentation process, the alcohol is turned into vinegar with its sour taste.
1．Which of the following is NOT a curing effect of vinegar?
A．To prevent lower blood pressure B．To help lose weight
C．To delay one’s mind getting old D．To cure cancer
2．The second paragraph mainly talks about ________.
A．the history of vinegar
B．how people used vinegar medically in history
C．the production of vinegar
D．how vinegar has functioned since ancient times
3．What topic the author could most possibly turn to following the last paragraph?
A．the production process of vinegar
B．the curing effects of vinegar
C．the production process of wine vinegar
D．the production process of apple cider vinegar
DBC
We’re surrounded by chemistry in everyday life. Sometimes it is easy to see, like when your science teacher does a big experiment in class. At other times, it can be pretty hard to see everyday chemistry at work, but nearly everything you touch or use has some element of chemistry in it.
Something as simple as toothpaste contains at least three chemicals, if not more. It is the mixture of them and its chemical reaction that keeps your teeth clean. Other things you use every day are created by chemistry, such as hair products, shampoo and soap. Adding detergent (洗涤剂) to water involves chemistry. Without chemistry, we would never have known that we need soap to get the oil out of clothes or skin. Chemistry not only helps us make products for use, but it also helps us understand the world around us. Chemistry helps us understand what the ozone layer (臭氧层) is and how it protects us. Chemistry also gives us sunscreen to protect us from the sun. Thanks to chemistry, we know bleach (漂白剂) can’t be mixed with vinegar(醋), because it can produce poisonous gas.Without chemistry, we wouldn’t have fireworks displays on important days.
Chemistry plays a big role in food preparation. Cooking food causes it to go through a chemical change. That is why cooked food often tastes different from raw food. Baking is a great example of chemistry. Too much or too little of any ingredient（成分，尤指烹饪） makes a difference to the result of baking, for example, the dough (面团) won’t rise or the cake will be flat.
Chemistry isn’t something that just lives in a lab; it’s something that you meet hundreds of times every day. Knowing how chemistry works will give you a greater understanding of the science behind some of the simplest-looking things.
【小题1】What’s the main idea of Paragraph 1?
| A．Chemistry is easy to see around us. |
| B．Sometimes chemistry is hard to see around us. |
| C．How a science teacher does a big experiment. |
| D．Few things in everyday life contain chemistry. |
| A．cleaning teeth with toothpaste |
| B．washing hair with hair products |
| C．using soap to get the oil out of clothes |
| D．washing your face with water |
| A．harmful | B．healthy | C．fresh | D．pleasant |
| A．One can’t find chemistry when cooking food. |
| B．Chemistry plays an important part in food mak-ing. |
| C．That dough rises is nothing to do with chemistry. |
| D．A flat cake is the result of too many ingredients. |
| A．Chemistry Around the House |
| B．Chemistry in Science |
| C．Chemistry for Dinner |
| D．Chemistry in everyday life |