★★★

看題：

1. It can be inferred that the author of the passage mentions the?efficiency?with which gray squirrels?forage primarily in order to?推斷+信息目的

2. It can be?inferred?that the author of the passage would be most likely to agree with which of the following statements about the “early view“??推斷+作者態(tài)度

兩題推斷，難，更需要找準(zhǔn)定位。

文章分析（方法來(lái)自武漢Sugar老師）：

①An influential early view held that ecosystems contain niches for a limited number of species and that competition for resources among species—whether native or nonnative invading ones—determines ecosystems' species composition.?②However, factors other than competition often help explain invading species'?success.?③For example, the American grey squirrel, often cited as a classic example of competitively superior invading species, was introduced in England in 1876 and now thrives, while the native red squirrel population has declined. ④Although scientists have found gray squirrels to be more efficient foragers than red ones, they also note that even before the gray squirrel's arrival, Britain's red squirrel populations had a periodic tendency to die out, only to be subsequently reintroduced. ⑤Furthermore, many gray squirrels are silent carriers of a disease fatal to red squirrels.

①?v1=competition

②?However, v2 other factors

③?eg.?∈v2

④?Although?v1,?v2f

⑤?Furthermore, v2f

① ? ②

? ? ? ? ?↓

? ? ? ? ?③?

? ? ? ? ?↓ ?+ ?⑤

? ? ? ? ?④

第一題的出題點(diǎn)在④里的v1

第二題的題點(diǎn)在于通過(guò)以上論證過(guò)程找到作者的落點(diǎn)所在（v2）

1. It can be inferred that the author of the passage mentions the?efficiency?with which gray squirrels?forage primarily in order to?推斷+信息目的，關(guān)注句內(nèi)關(guān)系

A. identify a factor that explains?a certain phenomenon?無(wú)關(guān)，題干中的efficiency定位要精準(zhǔn)，同時(shí)方向也反了，原文是個(gè)讓步信息

B. call attention to an?inconsistency in a particular theory?相反，嚴(yán)謹(jǐn)成分，是個(gè)讓步，inconsistency屬于直接取反

C. suggest that competition cannot be the factor responsible for a particular outcome?相反，起作用的是后半句

D. acknowledge a fact that appears to support a view that the authorin?tends to qualify?符合

E. cite evidence that is not?consistent with an?early influential view?about species competition?相反，同C

?

2. It can be?inferred?that the author of the passage would be most likely to agree with which of the following statements about the “early view?”?推斷+作者態(tài)度

C

A. It reflects a mistaken assumption about the?means?by which nonnative species are?introduced?into ecosystems. 沒(méi)有證據(jù)

B. Its basic premise is shown to be valid by the effect of American gray squirrels on Britain’s red squirrel population.?相反，人家舉的是反例大哥

C. It presents a simplistic picture of the means by which species composition within ecosystems?is determined. 符合

D. It can effectively explain the?formation of ecosystems that?contain few species?but cannot adequately?account for the?formation of complex ecosystems.?沒(méi)有證據(jù)/相反

E. It understates the importance of?competition as a factor determining species composition within ecosystems.?相反