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【单选题】
根据椎骨特征,不具有椎体的椎骨是( )。多选A.
寰椎
B.
枢椎
C.
胸椎
D.
腰椎
E.
尾椎
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举一反三
【单选题】Which of the following is TRUE according to the passage?
A.
People are usually willing to give evidence.
B.
Policemen feel that the image of their lives shown on TV is not accurate.
C.
Policemen and detectives spend little time at the typewriter.
D.
Generally the detective's work is over once the arrest has been made.
【单选题】The last paragraph of this passage may be concluded with the statement that ______.
A.
UN gives priority to peaceful settlement of the conflicts among countries
B.
the peacekeeping troops are most powerful in the conflicts between countries
C.
economic sanction will be imposed on the countries involved in war
D.
joint military action is the last resort of the Security Council in dealing with conflicts among countries
【简答题】已知圆O： ，由直线 上一点P作圆O的两条切线，切点为A，B，若在直线 上至少存在一点P，使 ，则k的取值范围是 .
【简答题】已知点 是直线 上一动点，PA、PB是圆 的两条切线， A、B是切点，若四边形PACB的最小面积是2，则k的值为
【单选题】Jack London became rich and famous
A.
when he was tobly
B.
when he was over twenty
C.
in his thirties
【单选题】When did Chekhov begin to publish stories?
A.
After he graduated.
B.
When he became a university student.
C.
In the 1940s.
D.
In 1892.
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