第17题: [单项选择]What does the word "think-tanks" (Line 5, Paragraph 2) mean A. Tanks that can think as human beings. B. An institute or group providing solutions for some problems. C. A group of authoritative people. D. Scholars and professional men. 参考答案:B 答案解析:语义题。根据文中的the Pentagon and sundry think-tanks可知think-tanks与the Pentagon“五角大楼,美国国防部”为并列关系,是某类组织机构,由此可推