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The English physician Edward Jenner found that if experimental subjects were deliberately infected with cowpox, which caused only a mild illness, they are immune from smallpox. A which caused only a mild illness, they are immune from 分析该选项. B causing only a mild illness, they become immune from 分析该选项. C which causes only a ...
Just as Edward Jenner used the pustules from milkmaids to inoculate against smallpox, effectively removing the specter of death that had hung over the population, the smallpox vaccine today is derived from a live virus, which immunologists have obtained from the pustules of infected organisms. A the smallpox vaccine today is derived from a live ...
题目选项分析. 选项A. 选项B. 选项C. 选项E. 比较两个句子语法结构语义，选出最佳答案：. Just as Edward Jenner used the pustules from milkmaids to inoculate against smallpox, effectively removing the specter of death that had hung over the population, so immunologists today use the pustules of infected organisms to ...
选项B. 选项C. 选项E. 比较两个句子语法结构语义，选出最佳答案：. Just as Edward Jenner used the pustules from milkmaids to inoculate against smallpox, effectively removing the specter of death that had hung over the population, so immunologists today use the pustules of infected organisms to obtain a live virus from ...
选项D. 比较两个句子语法结构语义，选出最佳答案：. The English physician Edward Jenner found that if experimental subjects were deliberately infected with cowpox, which caused only a mild illness, they would become immune to smallpox. The English physician Edward Jenner found that if experimental subjects were deliberately ...
选项B. 选项C. 选项E. 比较两个句子语法结构语义，选出最佳答案：. Just as Edward Jenner used the pustules from milkmaids to inoculate against smallpox, effectively removing the specter of death that had hung over the population, so immunologists today use the pustules of infected organisms to obtain a live virus from ...
选项B. 选项C. 选项D. 比较两个句子语法结构语义，选出最佳答案：. The English physician Edward Jenner found that if experimental subjects were deliberately infected with cowpox, which causes only a mild illness, they are immune to smallpox. The English physician Edward Jenner found that if experimental subjects were ...
