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【单选题】
窝洞的外形设计，正确的是：A.
邻面建立在接触区内
B.
外形线要棱角清晰
C.
与龋损范围大小无关
D.
洞缘扩展到健康牙体组织
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反馈参考答案：
举一反三
【单选题】The author states 'politicians assert but do not argue' at the end of Paragraph 3 in order to suggest that politicians ______.
A.
make claims without providing reasons for the claims
B.
take stronger positions on issues than in the past
C.
enjoy explaining the issues to broadcasters
D.
dislike having to explain their own positions on issues to citizens
【单选题】(Relying on) these convenient metaphors, politicians and military commanders do not see, or do not want to see, what these metaphors (hide): the reality of pain and death, the long-term health effects...
A.
Relying on
B.
hide
C.
for the injury
D.
effect on veterans
参考解析：
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