What's the thesis of the passage？
Affirmative action was under siege.
B. Diversity is essential.
C. More points should be given to the black.
D. Admission policy should be reformed.
Which of the following is not the author's argument？
A. Competitive colleges and universities need a mix of students with different experiences and background.
B. More points should be allocated for race or socioeconomic status.
C. In admitting students, traditional academic factors are weighed more.
Diversity has given America what is so good about it.
A manager who takes absolute control of a workplace situation, without reference to their
A. authorized
B. authoritative
C. authoritarian
D. authority
Which of the following is not mentioned in the passage？
A. The causes of BSE.
B. The quality of the artificial valve.
C. The result of failure of the valves of the heart.
D. The way to make valve with animal tissue.
微信支付 
支付宝支付