36套阅读 ex36 第7.8题~求高手指导

雪国90UID: 3006165

Experiments show that insects can function as pollinators of cycads, rare, palmlike tropical plants. Furthermore, cycads removed from their native habitats—and therefore from insects native to those habitats—are usually infertile. Nevertheless, anecdotal reports of wind pollination in cycads cannot be ignored. The structure of cycads male cones is quite consistent with the wind dispersal of pollen, clouds of which are released from some of the larger cones. The male cone of Cycas circinalis, for example, sheds almost 100 cubic centimeters of pollen, most of which is probably dispersed by wind. Furthermore, the structure of most female cycad cones seems inconsistent with direct pollination by wind. Only in the Cycas genus are the females' ovules accessible to airborne pollen, since only in this genus are the ovules surrounded by a loose aggregation of megasporophylls rather than by a tight cone.
(141 words)


For the following question, consider each of the choices separately and select all that apply
6. The passage suggests that which of the following is
true of the structure of cycad cones?
A The structure of cycad cones provides conclusive
evidence in favor of one particular explanation
of cycad pollination.
B The structure of male cycad cones rules out a
possible mechanism for cycad pollination that is
suggested by the structure of most female cycad
cones.
C The structure of male cycad cones is consistent
with a certain means of cycad pollination, but
that means is inconsistent with the structure of
most female cycad cones.


7. The evidence in favor of insect pollination of cycads
presented in the second sentence would be more
convincing if which of the following were also true?
(A) Only a small variety of cycad species can be
successfully transplanted.
(B) Cycads can sometimes be pollinated by means
other than wind or insects.
(C) Insects indigenous to regions to which cycads are
transplanted sometimes feed on cycads.
(D) Winds in the areas to which cycads are usually
transplanted are similar to winds in cycads'
native habitats.
(E) The transplantation of cycads from one region to
another usually involves the accidental removal
and introduction of insects as well.


问一下这篇阅读的两道题额。。。第6题为什么A不对，是因为A说的conclusive，而雌雄其实是不一样的还是怎么的。。。
第7题直接没头脑了。。。
对了~整片文章的主旨不是说风媒传播么？前两句话到底起的什么作用啊。。。。。求大神知道啊。。。

linacreUID: 2468672

6题请注意anecdotal“不科学，不系统”那个词，文中说风媒的说法虽然值得关注，但并不是系统，科学的研究结果，A的conclusive就错在这；
7题选D吧，逻辑题，问题是下面哪一种说法使得第二句更可信，第二句说：C在移植后离开了以前的环境，也就离开了以前环境中生活得昆虫，结果变得不育。
D之所以支持了第二句话，是因为D说C移植前后两地风都差不多，也就是说，如果移植前的风有助传粉，移植后也应该如此。但事实是移植后不育了，说明风媒这个前提不对，既然风媒不对，那自然第二句讲虫媒的就显得更可信了。
文章主要是讲风媒的，前两句是为了引出主题，所以第三句以转折“Nevertheless”开头。

雪国90UID: 3006165

2# linacre

膜拜啊~幸好在这里问了一下~不然我会以为6题是男女不一样所以用conclusive不对额。。。