OG-50 没人问：新问题。 请NN帮帮

pengfei1102

50 Airline: Newly developed collision-avoidance systems, although not fully tested to discover potential malfunctions, must be installed immediately in passenger planes. Their mechanical warnings enable pilots to avoid crashes.

Pilots: Pilots will not fly in planes with collision-avoidance systems that are not fully tested. Malfunctioning systems could mislead pilots, causing crashes.

The pilots’ objection is most strengthened if which of the following is true?

(A) It is always possible for mechanical devices to malfunction.

(B) Jet engines, although not fully tested when first put into use, have achieved exemplary performance and safety records.

(C) Although collision-avoidance systems will enable pilots to avoid some crashes, the likely malfunctions of the not-fully-tested systems will cause even more crashes.

(D) Many airline collisions are caused in part by the exhaustion of overworked pilots. C

(E) Collision-avoidance systems, at this stage of development, appear to have worked better in passenger planes than in cargo planes during experimental flights made over a six-month period.

答案c 没问题

若把答案 A 改成 这个 (A) It is always possible for mechanical devices that are  not fully texted to malfunction.

问 是不是 也可做 答案  

如果不是，为什么 ？？               possible 看起来好不爽~   

yaoyao99

No.  The possibility of the device malfunction must be linked to plane
crashes.  The device can still malfunction, for example, not make any
warning at all, and cause no additional crashes.

[此贴子已经被作者于2006-5-2 8:38:17编辑过]

pengfei1102

以下是引用yaoyao99在2006-5-2 8:37:00的发言：
No.  The possibility of the device malfunction must be linked to plane
crashes.  The device can still malfunction, for example, not make any
warning at all, and cause no additional crashes.

but the

Pilots: Pilots will not fly in planes with collision-avoidance systems that are not fully tested. Malfunctioning systems could mislead pilots, causing crashes.

does it mean :  malfucntion is not same as malfunctioning systems?  or other reason?    still some confusing.               help me .  thank you~

yaoyao99

Sure.  The second sentence has two conditions:
1. The system will malfunction, for example, stop working and not provide any warning.
2. The malfunctioning of the system will mislead pilots, causing crashes.

Your suggestion and the original choice A only talks about condition 1, which may or may not lead to condition 2.  That's why it won't work as a supporting evidence.

pengfei1102

THANK YOU! I GOT IT.

就是 说  (A) It is always possible for mechanical devices that are  not fully texted to malfunction 不能很好 的结合  pilots 说的话，。      Pilots: Pilots will not fly in planes with collision-avoidance systems that are not fully tested. Malfunctioning systems could mislead pilots, causing crashes.

谢谢 ~

yaoyao99

Anytime!

xieyongrenren

并不是所有的og的解释都很完美的.这题就是个例子