1.  When was Pluto officially declared to be found?
A    The date when Percival Lowell was born.
B    On March 13, 1930.
C    On May 1, 1330.
D    On the birthday of Venetia Burney.
 
2.  Who originally named the newly found planet as Pluto?
A    Percival Lowell.

B    Clyde Tombaugh.
C    V.M. Slipher.
D   Venetia Burnye.

答案：1.  B      2.  D