According to Para. 1, counting and describing are associated with ______.
A. descriptive statistics
B. qualitative changes
C. inferential statistics
D. unknown variables
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听力原文：M: Helen, don't forget to take out your umbrella.
W: Oh, it's just overcast.
Q: What does Helen mean？
(15)
A. She doesn't need an umbrella.
B. She left her umbrella in the car.
C. She can hold her umbrella over the man's head.
D. She's the only one who doesn't have an umbrella.
The word "squarely" in the last sentence of the first paragraph could be best replaced by
A. solidly
B. geometrically
C. haphazardly
D. rectangularly
A．One week.B．Two weeks.C．Three days.D．Seventeen days.
A. One week.
B. Two weeks.
C. Three days.
D. Seventeen days.
In the second paragraph, the word "ratio" refers to ______.
A. minimum input divided by maximum output
B. given input divided by maximum output
C. output divided by input
D. money divided by output
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