5th box -Flashcards

Multiple choice questions

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1. lesson19

A Fan in the Air Fog, tiny droplets of water vapor, is the villain of the airports. In an effort to eliminate dense fog from airports, weathermen utilize giant fan, nylon strings, and chemicals dropped from planes or shot upwards from strange machines on the ground. Nothing works as well, though, as a new weapon in the fight against fog: the helicopter. Researchers believe that if warm dry above the fog could somehow be driven down into the humid blanket of fog, the droplets would evaporate. thus clearing the air. In a recent experiment to test their theory the researchers had a helicopter descend into the fog above barely visible Smith Mountain Airport near Roanoke, Virginia. The blades of the helicopter caused the air to circulate downwards and an enormous hole in the clouds opened above the airport. Weathermen predict that with larger, more expensive helicopters they will be able to make the thickest fog vanish.
Roast Beef on Rye A little digging will unearth the roots of our language and habits. For instance, our word "sandwich" is derived from the Earl of Sandwich, who lived in the time of George Ill. This gentleman would not depart from the gambling table for hours on end. If his play happened to coincide with dinner, he would cancel his regular meal and order a slice of meat to be served to him between two pieces of bread. The biography of the Earl claims that we are his debtors for his discovery of the sandwich. Charles Dickens later used the phrase "sandwich man" to describe someone who walks about with a clearly legible message on placards hung on his chest and back. An example of a superstition is the fear of walking under a ladder. This must have been a contagious fear for it seems to have started with the ancient belief that spirits lived in trees or wood. "Knocking on wood" was a way of calling up the friendly spirit to protect one from harm. Today a member of the clergy might sneer at this custom, expecting that by this time such superstitions would have receded into the past with witches and ghosts. Another expression, "giving someone the cold shoulder," has been traced to the Middle Ages, when a host would serve his guests a cold shoulder of mutton or beef instead of the customary hot food. This was a transparent attempt to show the guest he was no longer welcome. The host had thus found a more charitable yet effective way of expressing his feelings without using a scalding remark.
Protecting Our Health Pick an apple, a tomato, a peach-no worms in the harvest. We are familiar with the abundant use of pesticides by farmers, but today's chemists are becoming uneasy. They calculate that there are 45,000 different pesticides, and all of them can be absorbed by the fruit on which they are sprayed. The chemists estimate that every morsel we eat in the future may contain a deadly quota of pesticide. The tragedy* will come slowly but the threat is real. These government chemists do not suggest that we ban pesticides. They are cautious* and do not easily panic. What is needed, they say, are appropriate, budgeted* doses that will not pollute* our food.
The Challenge* of the Small Car The auto makers in Detroit barely survived* the tragedy of 1956. That was the year the consumer became aware* of the Volkswagen, and the auto market was forever altered.* Once Americans got a glance at this low-priced, nimble, small car that one could manipulate so easily, they frequently* refused those horrid Detroit monsters with eight cylinders and ten miles to each gallon of gasoline. Many pedestrians, previously uninterested in owning a car, began to purchase small foreign cars.Conservative as well as reckless drivers found the price within their budget and became customers. Volkswagen owners would rave about their economical cars, telling everyone how little gas they used and how infrequently* they needed to be lubricated. Volkswagen, once one of the most popular* small cars sold in America, has now fallen behind the autos of the ingenious Japanese manufacturers.

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