题目内容：
PANDEMIC:
参考答案：
答案解析：
单选题：PANDEMIC:
- 题目分类：GRE
- 题目类型：单选题
- 查看权限：VIP
The primary purpose of the passage is to
The primary purpose of the passage is to
COPPER: METAL::
COPPER: METAL::
（ ）对于吃药相当于游泳对于（ ）
（ ）对于吃药相当于游泳对于（ ）
根据材料请回答下列题目：Into the UnknownThe world has never seen populat
根据材料请回答下列题目：Into the UnknownThe world has never seen population ageing before. C
DEEP : PROFOUND ::
DEEP : PROFOUND ::