具有抗吞噬作用的细菌结构是（）（P441）
A、细胞壁
B、芽孢
C、荚膜
D、菌毛
E、鞭毛
参考答案：C
As always when she sang in the bathroom, she________the high notes in a special way.
A．span out
B．belted out
C．spread out
D．stretch out
汽轮机的内部损失有哪些？
