After the 1960 s, China began to inoculate BCG, pertussis, diphtheria, tetanus, measles and poliomyelitis vaccines.六十年代后, 中国开始在大、中城市接种卡介苗 、 百日咳 、 白喉 、 破伤风 、 麻疹、脊髓灰质炎的疫苗的工作....a program to inoculate every child in the sta...
Chris Boardman won the Olympic 4,000 metres pursuit...克里斯·博德曼赢得了奥运会4,000米自行车追逐赛的冠军。Chris Boardman stamped himself as the 4,000m favourite by setting the world's fastest outdoor time in Barcelona last night.克里斯·博德曼昨晚...
During the Pleistocene Ice Age , the ancient drainage systems were almost completely rearranged by glaciation.在更新世冰期, 古水系常被冰川作用完全改造.Agassiz recognized marks of glaciation all over northern Europe.阿加西斯发现了整个北欧的冰川标志.The Neo...