Which of the following might be the best title of the passage?
A.Medical Bills Covered in Car Insurance.
B.Importance of Buying Car Insurance.
C.Advice on Buying Car Insurance.
D.Advantages of Car Insurance.
第5题
A.X 射线、波粒二象性、原子
B.X 射线、放射性、电子
C.α射线、放射性、中子
D.光电效应、α粒子反射、电子
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