What can be inferred about the professor？
A. She tries to be fair to all of her students.
B. She is not very flexible about her policies.
C. She does not have very many students.
D. She is not sure what she wants to do.
查看答案
国民收入核算中投资总是等于储蓄。
A. 正确
B. 错误
A．strictB．athleticC．wealthyD．amazing
A. strict
B. athletic
C. wealthy
D. amazing
A．atB．fromC．inD．out
A. at
B. from
C. in
D. out
According to the man, why is it important to mention that the subjects were randomly selected？
A. The random selection explains why the results were so general.
B. This information allows another researcher to repeat the experiment.
C. The lab assistant included it in the example that the students received.
D. Randomly selected subjects assure researchers of an accurate outcome.
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