1972年，经国务院批准，广州春交会向38户美商发出邀请，应邀到会42人，这是中美贸易中断20多年后美商首次到中国参会。与这一事件有直接关系的是（ ）
A．中日关系改善
B．《中美联合公报》的发表
C．中美正式建交
D．中国开始实行改革开放
答案：B
题目分析：“1972年”是解题的关键，依据已学知识可知1972年尼克松访华，双方在上海签署《中美联合公报》(又称《上海公报》)，标志着中美隔绝状态的结束和关系正常化进程的开始，B符合题意；A中日关系的改善是在1979年，C是1979年，D是1978年，在时间上均不合题意，故选B。
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| The tourism has become a very big 1 . Millions of people now 2 their holidays in other countries. The travel companies say that spending holidays in 3 places can help people to understand each other better. This can help towards peace (和平) and love among the 4 . These ideas may bring good business, 5 they aren't true to life. Very 6 of today's tourists want to know the people of the countries they are _7 . They just want a week or two of sunshine to lie on the 8 ___ by the sea. Most tourists do not want to discover things for 9 . They 10 want to travel and stay with their own families or friends for the whole holidays. The tourist business is really very easy for the travel companies. | ||||
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