小菜小谋，这两个题怎么得出这答案呢？

1)The contents of the raw data file SIZE are listed below:

----|----10---|----20---|----30
72 95

The following SAS program is submitted:

data test;
infile 'size';
input@ 1 height 2. @ 4 weight 2;
run;

Which one of the following is the value of the variable WEIGHT in the output data set?

A. 2
B. 72
C. 95
D. . (missing numeric value)


answer:A

************************
2)The following SAS program is submitted:

data work.january;
set work.allmonths (keep=product month num_sold cost);
if month='jan'then output work.january;
sales=cost*num_sold;
keep=product sales;
run;

Which variables does the WORK.JANUARY data set contain?

A. PRODUCT and SALES only
B. PRODUCT, MONTH, NUM_SOLD and COST only
C. PRODUCT, SALES, MONTH, NUM_SOLD and COST only
D. An incomplete output data set is created due to syntax errors.

answer: D