[求助]一道数学题，GWD的，拜托了

yang8630

Q35:（我选D，但答案是C，觉得答案有问题）

    

Stations X and Y are connected by two separate,
straight, parallel rail lines that are 250 miles long.  Train P
and train Q simultaneously left
Station X and Station Y, respectively, and each train traveled
to the other’s point of departure.  The
two trains passed each other after traveling for 2 hours.  When the two trains passed, which train was
nearer to its destination?

    

(1)   At the time when the two trains passed, train
P had averaged a speed of 70 miles
per hour.

    

(2)
          Train Q averaged a speed of 55 miles per hour for the entire trip.

    

                  

    

A. Statement (1) ALONE
is sufficient, but statement (2) alone is not sufficient.

    

B. Statement (2) ALONE
is sufficient, but statement (1) alone is not sufficient.

    

C. BOTH statements
TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.

    

D. EACH statement
ALONE is sufficient.

    

E. Statements (1) and (2) TOGETHER are NOT
sufficient.

[此贴子已经被作者于2008-10-26 14:15:28编辑过]

yang8630

拜托了

yang8630

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