Dust quickly ______ if we don’t sweep our floor.A、accumulatesB、collectsC、gathersD、increa

回答题。

When a 13-year-old Virginia girl started sneezing, her parents thought it was merely a cold．Butwhen the sneezes continued for hours, they called in a doctor．Nearly two months later the girl wasstill sneezing, thousands of times a day, and her case had attracted worldwide attention．

Hundreds of suggestions, ranging from" put a clothes pin on her nose"to "have her stand on herhead" poured in．But nothing did any good．Finally, she was taken to Johns Hopkins Hospital whereDr．Leo Kanner, one of the world&39;s top authorities on sneezing, solved the baffling (难以理解的)problem with great speed．

He used neither drugs nor surgery, curiously enough, the clue for the treatment was found in anancient superstition about the amazing bodily reaction we call the sneeze．It was all in her mind, hesaid,a view which Aristotle, some 3,000 years earlier, would have agreed with heartily．

Dr．Kanner simply gave a modem psychological interpretation to the ancient belief that too muchsneezing was an indication that the spirit was troubled; and he began to treat the girl accordingly．

"Less than two days in a hospital room,a plan for better scholastic and vocational adjustment,and reassurance about her unreasonable fear of tuberculosis quickly changed her from a sneezer to anex-sneezer," he reported．

Sneezing has always been a subject of wonder, awe and puzzlement．Dr．Kanner has collectedthousands of superstitions concerning it．The most universal one is the custom of begging for theblessing of God when a person sneezes--a practice Dr．Kanner traces back to the ancient belief that asneeze was an indication that the sneezer was possessed of an evil spirit．Strangely, people over theworld still continue the custom with the traditional, "God bless you" or its equivalent．

When scientists look at the sneeze, they see a remarkable mechanism which, without any con-scious help from you, takes on a job that has to be done．When you need to sneeze you sneeze, thisbeing nature&39; s clever way of getting rid of an annoying object from the nose．The object may be justsome dust in the nose which nature is striving to remove．

The girl sneezed continuously because she__________． 查看材料

A.was ill

B.was mentally ill

C.had heavy mental burden

D.had attracted world-wide attention

a good deal of speculation. Perhaps the most reasonable explanation is as follows. Ants have a pouch in the bottom of their mouths called the infrabuccal pocket. Any solid food they eat goes into this pocket, where the soluble substances are dissolved. The liquid solution is swallowed, but the solids are screened out and accumulate in the pouch. Being fastidious animals, much of the ants leisure time is spent in combing bits of dirt and debris off their bodies. This grooming is accomplished by means of fine combs on their forelegs. The combs, in turn, are cleaned by passing them neatly through the mouth. So the particles of dust, dirt, and other solid matter so acquired end up in the infrabuccal pocket. In time the pouch becomes filled, and the contents are thrown out, much as a baseball player or cowboy may dispose of a spent chew of tobacco.

Before such disposal, the pouch is moist and warm, and it is highly likely that among its contents would be a great variety if microscopic fungus spores, or seeds. Although most if the spores perish in the pouch, others thrive, When the waste material is deposited in the nest, fungi grow and cover the material. Since certain kinds of fungi are high in food value, and since the ants can subsist on them, it is not surprising that some of the more clever kinds of ants should have learned to cultivate them.

(1).What is the purpose of the infrabuccal pocket in ants？

选项格式A、To digest solid foods

B、To collect debris

C、To liquefy solids

D、To hold soluble substances

(2).According to the passage, ants constantly groom themselves because

A、they have a strong desire to be clean

B、dirt in their bodies prevents them moving quickly

C、they have very little to occupy their time

D、it is a type of social ritual

(3).What do ants do to clean out their infrabuccal pockets？

选项格式A、Swallow the accumulated debris

B、Turn the pockets inside out

C、Spit out the waste material

D、Remove the pockets for cleaning

(4).According to the passage, the spores in the infrabuccal poclets

选项格式A、mainly die

B、never survive

C、dry up

D、mostly thrive

(5).We understand from the passage that when the infrabuccal pockets are cleaned out

选项格式A、the waste material is made into the nests

B、spores in the material develop into fungi

C、the material is consumed by fungi

D、seeds fall to the ground and start to cover the material

A.Temperature

B.Power

C.Humidity

D.Dust

Damage to cargo caused by dust is known as ______.

A.contamination

B.oxidation

C.tainting

D.vaporization

A.Dust

B.PowerSurge

C.Excessivehumidity

D.Hightemperatures

Atmospheres laden with coal dust or grain dust caused by loading these cargoes ______．

A.require loading operations to be shut down until the atmosphere clears

B.are toxic to human life

C.are subject to spontaneous combustion

D.may be explosive in some concentrations

A.pests

B.dust

C.germs

D.anti

A.selecting

B.collecting

C.electing

D.neglecting