| 资源名称 | 类型 | 大小 | 下载 |
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| 资源名称 | 类型 | 语言 | 下载 |
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In an easy and accessible form, the film introduces the flu virus, methods of combating the disease and its prevention. Commissioned by the USSR Ministry of Health.
| 资源名称 | 类型 | 大小 | 下载 |
|---|
| 资源名称 | 类型 | 语言 | 下载 |
|---|
In an easy and accessible form, the film introduces the flu virus, methods of combating the disease and its prevention. Commissioned by the USSR Ministry of Health.