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【多选题】
可用来判断现象相关方向的指标有A.
相关系数
B.
回归系数
C.
回归方程参数α
D.
估计标准误差
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皮皮学刷刷变学霸
举一反三
【单选题】_______as an Olympic event, a sport must be played in at least 75 countries on at least 4 continents.
A.
To accept
B.
Having accepted
C.
To be accepted
D.
Accepting
【单选题】To be elected to the Senate a person must______.
A.
be at least 25 years old
B.
be at least 30 years old
C.
have been a citizen for seven years
D.
be a lawyer
【多选题】Which of the following does the professor mention as the benefits of the study of fossils?[Clink on 2 answers. ]
A.
It provides information on how dinosaurs become extinct.
B.
It helps petroleum engineers with the finding of oil.
C.
It helps petroleum engineers to purify oil.
D.
It gives clues to how life originated and evolved.
【单选题】Which of the following did the woman NOT mention about the production of the armchairs?
A.
Time.
B.
Labor.
C.
Technology.
【单选题】Which of the following does the passage mention as necessary for both the production of oxygen by photodissociation and the production of oxygen by plants?
A.
Water
B.
Hydrogen
C.
Carbon dioxide
D.
Nitrogen
【单选题】Which of the following doesn't the woman mention as the way to get information?
A.
Television.
B.
Radio.
C.
Internet.
D.
All sorts of magazines.
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