下列细胞哪种体积最大（）.
A.精原细胞
B.初级精母细胞
C.次级精母细胞
D.精子细胞
参考答案：B
（11·丹东）已知：线段AB=3.5cm，⊙A和⊙B的半径分别是1.5cm和4cm，则⊙A和⊙B的位置关系是____________.
In order to increase their vote, they _________ another candidate a traitor to the country.
A．announced
B．declared
C．thought
D．conquered
