题目内容：
The vaccine activates the immune system.
A．Right B．Wrong
C．Not mentioned
参考答案：
答案解析：
单选题：The vaccine activates the immune system.
- 题目分类：卫生类
- 题目类型：单选题
- 查看权限：VIP
B．Wrong
C．Not mentioned
B．Wrong
C．Not mentioned
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