患者在医院内因输血而感染了某病疾病这种传播方式属于
A．空气飞沫传播B．接触传播C．诊疗手术传播D．药品和各种制剂传播E．虫媒传播
参考答案：D
My friend showed me round the town, ________was very kind of him. [ ]
A. which
B. that
C. where
D. it
一个细胞放入溶液中，其体积如何变化？
