离心机按转速分类，分为高速离心机、低速离心机和（）。
A.分析离心机
B.细胞涂片离心机
C.超速离心机
D.冷冻离心机
E.台式离心机
参考答案：C
After many years’ waiting, Chinese people______ realized their dream to hold the Olympic Games.
A．constantly
B．eventually
C．lastly
D．generally
