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听力原文：Thank you for staying tuned to Talk Tonight. Our special guest this evening is a graduate of West Point. He was a former intelligence officer and retired lieutenant general who served under two presidents. This man is also an expert on Russia and frequently lectures at universities across the nation. He is here this evening promoting his new book, Behind the Kremlin, which gives us insight on Russian politics. It is currently on the best seller's list. It's my plesure now to welcome Mr. Ivan Strand.What is the main purpose of this speech?A．To describe a bookB．To promote a productC．To introduce a guestD．To announce a program 点击查看答案

是指投保人向保险人提出的确定的，明确的订立保险合同的意思表示,即提出保险要求.A．载明B．承担C．承保D．投保

A.
A．载明
B．承担
C．承保
D．投保

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