if the specialists evolved independently on each island, then a specialist on one island would be more closely related to other types of anoles on the same island-regardless of their ecological niches-than it would be to a similar specialist on a different island.

DNA evidence concerning the anoles led researchers to conclude that habitat specialists on one island are not closely related to the same habitat specialists elsewhere, indicating that specialists evolved independently on each island.

这两句话定位

resemble的原因是lizard species differ from.....？
相像的原因是不同，请问这是怎么理解的呀？

题目过于容易了。我640的水平考出了760分2333

robbing the oysters there of their flavor and making them smaller

是伴随状语，主语是 increasing demands。 但是，难道不应该是alter the saline content 造成的么？

Diction; Logical predication
The sentence as written is not stated clearly. For example, it is unclear what
is shaped so smoothly and perfectly; it could be either the airplanes or
the wings. Upon considering the likely intended meaning, along with a review
of the other answer choices, it seems most likely that the phrase is intended to
modify frictionless wings.
Next, we need to consider whether it makes more sense to say that the wings
are smooth or shaped smoothly. This issue can be determined only by
considering the most plausible intended meaning rather than by considering
just the grammar of the sentence. The idea of being smoothly shaped would
seem already to be part of the idea of being shaped perfectly, and therefore it
is redundant. On the other hand, having a surface that is very smooth would
be crucial in a quest to make an airplane wing frictionless; for this reason, it
makes sense to point out that the wings themselves are smooth.

A. This choice is incorrect for the reasons stated above.
B. Correct. Given the repetition of the word wings, it is clear that what
follows modifies wings and not airplanes. Describing the wings
as smooth and perfectly shaped clearly conveys what is most likely
intended.
C. In this version, note that shaped is modified. For this reason, proper
grammar requires that the adverbs smoothly and perfectly are needed
rather than the adjectives smooth and perfect. However, as discussed
previously, the intended meaning of the sentence would be better
conveyed if we used the adjective smoothto modify wings rather than the
adverb smoothly to modify shaped.
D. It is initially unclear what is being described as having been shaped in
such a smooth and perfect manner; it could be either the airplane or its

wings. Even if that were clarified, however, the sentence would be flawed:
the sentence is intended to describe the wings themselves, not
the manner in which the wings were shaped. That is, this wording could
be interpreted as referring to the nature of the wings themselves or to the
process through which they were made. This ambiguity makes the
meaning of the sentence unclear.
E. This version is very awkwardly worded, mainly because of having been.
Furthermore, this version describes the act of shaping the wings. Because
the sentence is instead meant to describe the wings themselves, this
choice is incorrect.

Verb form; Rhetorical construction
This sentence is well-formed. It appropriately uses the construction to try
to rather than the common yet idiomatically inappropriate to try and. It also
uses the idiomatically correct construction recover . . . from.
A. Correct. This choice is correct for the reasons discussed above.
B. This choice uses the idiomatically incorrect construction to try and.
C. This choice suggests that what is prohibitively expensive is trying to
recover uranium . . . rather than the process of recovering uranium itself.
D. To try for is idiomatically incorrect, as is the recovery . . . out of.
E. To try to do—as opposed to to attempt, for example—is awkward and
unnecessarily wordy.
The correct answer is A.

虛擬語氣，主句用将来时，从句用一般现在时

我比他们吃的苹果多，这句话没毛病啊

1/3....1 2^n是4的倍数

答案没错，因为说了至少参加一场课程， 画出文氏图就发现，只要下午没上课的一定都是只去上午上课的人。

whether讨论的是是否会发生，没有预设已经发生了，不需要虚拟语气；what讨论的是如果发生了会有什么影响，预设已经发生，需要虚拟语气

根据原文内容一步步往下看，选出答案，容易混淆：对于build strategy，应为individual比较有效

到底是核桃小，还是产量小？？