In 2013 Mr.Baugher planted 7，000 Fuji apple trees in the orchard（果園）.Three years later，just when the trees should have been bearing fruit，he noticed that a few of them had yellow leaves.Within weeks they were dead.The next year，the problem spread to more than a few trees.By last year，2，000 of Mr Baugher's 7，000 new trees were dead.
Mr.Baugher has the worst case of "rapid apple decline"（RAD）in the county，but he is not alone.The mysterious disease has been troubling growers across America's northeast for at least six years.Kari Peter，a fruit-tree specialist first observed massive die-offs in her research orchard in 2013.She came up with the term "RAD".But her attempts to explain it have not produced much fruit.The usual reasons for the death of tree-mould infestation，a known virus，disease，an early frost-didn't fit symptoms.Her investigation only ruled things out.
The dead trees tend to be younger：two to eight-years-old.They are nearing he prime of production.Dwarf trees，which are commonly used by commercial growers，seem to be the most subject.Historically，orchards held 600-700 apple trees an acre，but most are now high producing dwarf trees，which are more compact.Growers plant 1，200-1，500 trees per acre.Working with the Department of Agriculture Kari found a new hidden apple virus in the infected trees.But they cannot be sure if this new virus has any connection with the decline.
Researchers at Cormell University found that severe cold followed by drought（旱災(zāi)）could have weakened the trees leaving them subject to viruses.Other scientists think that herbicides may be to blame.Dan Donahue，a fruit-tree specialist says it could be any or all of those theories.In a recent sampling，he found that 64% of young trees had hidden viruses.These do not show symptoms，but they could affect vitality.Older，larger apple trees were better at shrugging off the viruses.
RAD is a big worry for the apple growers.Customer taste is changing.Traditional varieties like Red Delicious are no longer a customer favourite，so growers are having to invest in new varieties.Few of the orchard growers are able to absorb the economic losses.
Mr.Baugher found some relief in the Tree Assistance Programme，through which the federal government provides financial assistance to orchard-owners whose trees are damaged by natural disasters.The sudden death of apple trees may not seem as dramatic as a hurricane，but it is perhaps even more dangerous.Americans have given considerably more before in the defense of apple pie.
（1）The underlined word "compact" is closest in meaning to BB .
A．complex
B．dense
C．remote
D．regular
（2）What can be learned about Kari Peter？ CC
A．It took her six years to come up with the term RAD.
B．Her research led to a breakthrough in apple cultivation.
C．She failed to find out the definite cause of RAD.
D．She was the first scientist to research apple trees.
（3）Based on the various researches，RAD may be caused by the following EXCEPT DD.
A．extreme weather
B．a(chǎn) new virus
C．way of tree cultivation
D．location of the orchard
（4）What can be inferred from the passage？ AA
A．RAD adds to the pressure on the already struggling apple growers.
B．RAD doesn't qualify orchard growers for financial assistance.
C．The government needs to fund more research into RAD.
D．Apple growers should have stuck to traditional varieties.
【考點(diǎn)】說明文．
【答案】B；C；D；A
【解答】
【點(diǎn)評】
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發(fā)布：2024/4/20 14:35:0組卷：8引用：2難度：0.5
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D．Unbelievable.發(fā)布：2025/1/6 15:30:8組卷：0引用：1難度：0.5 -
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B．Endangered species are paid more attention to by humans.
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D．sitting in the garden
（2）From the second paragraph，we can see that.
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D．Man can't live without natural areas.發(fā)布：2025/1/6 16:30:6組卷：0引用：1難度：0.5
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