[問題] 兩題PP邏輯

[paradox1104 (一天我都不想等)]

請教各位板友兩題PP CR的問題

PP-1-20

For years the beautiful Renaissance buildings in Palitito have been damaged

by exhaust from the many tour buses that come to the city.  There has been

little parking space, so most buses have idled at the curb during each stop

on their tour, and idling produces as much exhaust as driving.  The city has

now provided parking that accommodates a third of the tour buses, so damage

to Palitito's buildings from the buses' exhaust will diminish significantly.

Which of the following, if true, most strongly supports the argument?

(A) The exhaust from Palitito's few automobiles is not a significant threat

to Palitito's buildings.

(B) Palitito's Renaissance buildings are not threatened by pollution other

than engine exhaust.

(C) Tour buses typically spend less than one-quarter of the time they are in

Palitito transporting passengers from one site to another.

(D) More tourists come to Palitito by tour bus than by any other single means

of transportation.

(E) Some of the tour buses that are unable to find parking drive around

Palitito while their passengers are visiting a site.


答案是C 我選B 雖然後來仔細看 覺得B比較像assumption

不過C不知道該怎麼解釋

Test1-24.   (29155-!-item-!-188;#058&003857)

Tiger beetles are such fast runners that they can capture virtually any

nonflying insect.  However, when running toward an insect, the beetles

intermittently stop, and then, a moment later, resume their attack.  Perhaps

they cannot maintain their pace and must pause for a moment's rest; but an

alternative hypothesis is that while running tiger beetles are unable to

process the resulting rapidly changing visual information, and so quickly go

blind and stop.

Which of the following, if discovered in experiments using artificially moved

prey insects, would support one of the two hypotheses and undermine the other?

(A) When a prey insect is moved directly toward a beetle that has been

chasing it, the beetle immediately turns and runs away without its usual

intermittent stopping.

(B) In pursuing a moving insect, the beetles usually respond immediately to

changes in the insect's direction, and pause equally frequently whether the

chase is up or down an incline.

(C) The beetles maintain a fixed time interval between pauses, although when

an insect that had been stationary begins to flee, the beetle increases its

speed after its next pause.

(D) If, when a beetle pauses, it has not gained on the insect it is pursuing,

the beetle generally ends its pursuit.

(E) When an obstacle is suddenly introduced just in front of running beetles,

the beetles sometimes stop immediately, but they never respond by running

around the barrier.

這題答案是C  只有 B C兩個答案可能是對的

不過感覺B是兩者都支持 而C雖然是答案 可是我看不出來他哪裡有undermine第二個

hypotheses

謝謝~~

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推 flac:如果巴士花在運輸旅客的時間也很多的話 就不僅idle會造成傷害
→ flac:運輸過程也會 所以C提出這點 來支持減少巴士idle確實是有效的
推 flac:B其實也不差 可惜它只能說明損害的禍因較多來自於巴士 不夠強
→ flac:因為題目是針對巴士當中某個情況(idle)來解決問題 所以選項
→ flac:就只能選有提到巴士的"其他狀況"的選項
→ paradox1104:感謝你的回答~~^^