X-ray examination of a recently discovered painting — judged by some authorities to be a self-portrait by Vincent van Gogh — revealed an underimage of a woman’s face. Either van Gogh or another painter covered the first painting with the portrait now seen on the surface of the canvas. Because the face of the woman in the underimage also appears on canvases van Gogh is known to have painted, the surface painting must be an authentic self-portrait by van Gogh. The conclusion above is properly drawn if which of the following is assumed
A. If a canvas already bears a painted image produced by an artist, a second artist who uses the canvas to produce a new painting tends to be influenced by the style of the first artist.
B. Many painted canvases that can be reliably attributed to van Gogh contain underimages of subjects that appear on at least one other canvas that van Gogh is known to have painted.
C. Any painted canvas incorrectly attributed to van Gogh would not contain an underimage of a subject that appears in authentic paintings by that artist.
D. A painted canvas cannot be reliably attributed to an artist unless the authenticity of any underimage that painting might contain can be reliably attributed to the artist.
E. A painted canvas cannot be reliably attributed to a particular artist unless a reliable X-ray examination of the painting is performed.
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A thorough search of Edgar Allan Poe’s correspondence has turned up not a single letter in which be mentions his reputed morphine addiction. On the basis of this evidence it is safe to say that Poe’s reputation for having been a morphine addict is undeserved and that reports of his supposed addiction are untrue. Which of the following is assumed by the argument above
A. Reports claiming that Poe was addicted to morphine did not begin to circulate until after his death.
B. None of the reports of Poe’s supposed morphine addiction can be traced to individuals who actually knew Poe.
C. Poe’s income from writing would not have been sufficient to support a morphine addiction.
D. Poe would have been unable to carry on an extensive correspondence while under the influence of morphine.
E. Fear of the consequences would not have prevented Poe from indicating in his correspondence that he was addicted to morphine.
一般墙面拉毛抹灰用混合砂浆，其材料体积配合比例为：水泥:石灰膏:黄砂=1:1:1。( )
A. 对
B. 错
装饰抹灰砂浆所选用的色浆与石子间的比例大小主要取决于石子级配的好坏和色彩与石子间的关系恰当与否，可通过加水搅拌进行观察调整。( )
A. 对
B. 错
Current legislation that requires designated sections for smokers and nonsmokers on the premises of privately owned businesses is an intrusion into the private sector that cannot be justified. The fact that studies indicate that nonsmokers might be harmed by inhaling the smoke from others’ cigarettes is not the main issue. Rather, the main issue concerns the government’s violation of the right of private businesses to determine their own policies and rules. Which one of the following is a principle that, if accepted, could enable the conclusion to be properly drawn
A. Government intrusion into the policies and rules of private businesses is justified only when individuals might be harmed.
B. The right of individuals to breathe safe air supersedes the right of businesses to be free from government intrusion.
C. The right of businesses to self-determination overrides whatever right or duty the government may have to protect the individual.
D. It is the duty of private businesses to protect employees from harm in the workplace.
E. Where the rights of businesses and the duty of government conflict, the main issue is finding a successful compromise.
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