123题库中的#54

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123题库中的#54
The following SAS program is submitted:
data work.new;
length word $7;
amount = 4;
if amount=4 then word ='FOUR';
else if amount=7 then word ='SEVEN';
else word='NONE!!!';
amount=7;
run;

Which one of the following represents the values of the AMOUNT and WORD variables?
A. amount word
7  FOUR
B. amount word
7 SEVEN
C. amount word
4 FOUR
D. ' ' (missing character value)

为啥选A？  

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关键词：represents following Character represent Variables represents character following SEVEN amount

第一个amount=4, 在执行If语句时，赋值word为FOUR;
RUN;前面的amount=7, 重新给amount 赋值为7.
所以选A