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外语
The Salk polio vaccine provides immunity from that disease.
The Salk polio vaccine provides immunity from that disease.
admin
2011-02-26
22
问题
The Salk polio vaccine provides immunity from that disease.
选项
A、security
B、publicity
C、liability
D、help
答案
A
解析
转载请注明原文地址:https://jikaoti.com/ti/JdXYFFFM
0
考博英语
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