逻辑10套的第4套的几道题

gaojianoneUID: 2705366

2.The tomb of a warrior killed in 1501 bears a sculpted
portrait depicting him dressed for battle．Some his-
torians attribute the portrait to an artist from that
century, but of the many references to the tomb in
surviving documents, none that predates the 1800's
mentions the portrait．The portrait is therefore more
likely the work of a much later artist
Which of the following, if true, would also support
the conclusion of the argument if substituted for the
evidence given concerning the portrait？
(A)The portrait of the warrior was commissioned by
the family of the warrior's widow．
(B)References in surviving documents mention that
an artist was paid in 1525 for an unspecified
number of works for the church in which the
tomb is located
(C)The warrior is depicted in the portrait as wearing
boots made of a material not used for boots
until the 1700's．
(D)Some other art treasures from the church in
which the tomb is located have been reliable
dated to the 1400's．
(E)The portrait of the warrior on the tomb strongly
resembles a portrait of him known to have
been completed during his lifetime．
答案C，我选了A。文章说“The portrait is therefore more
likely the work of a much later artist” later 是指1800以后吗？C只能证明肖像是1700年以后画的啊。

11.Certain extremely harmful bacteria found only in
sewage are difficult to detect directly. Testing for
E. coli, an easily detected and less harmful type of
bacteria, in ocean water would be a reliable way of
determining whether or not these more harmful bac-
teria are present, since ocean water contains E. Coli
only if the water is contaminated with sewage that
contains the harmful bacteria.
Which of the following, if true, most seriously
weakens the argument?
(A) There are many different strains of the E. coli
bacteria, and only some of these strains are
harmful.
(B) Some types of bacteria found in sewage are
neither disease-causing nor difficult to detect
directly.
(C) Some of the types of bacteria found in sewage
along with E. coli are not harmful to people
unless the bacteria are ingested in large quantities.
(D) E. coli dies out much more quickly than some of
the more harmful bacteria found in sewage and
then can no longer be easily detected.
(E) Some of the types of bacteria found in sewage
along with E. coli reproduce at a slower rate
than E. coli.
答案B，我选了D。

szmanutdUID: 2727152

1你理解的方向是对的 但是later不一定是1800后吧
2 B比D否定的更干脆了 不觉得么···

gaojianoneUID: 2705366

2# szmanutd 1.later总得有一个时间点作参照吧，C仅仅能证明画是1700年以后的啊。2.其他没有毒性又易于被检测的细菌的存在对实验有什么影响吗？