丰富，因此选D项。

　　2．Which of the following isn't a way of greeting visitors?

　　A．Dressing up.

　　B．Dancing and singing.

　　C．Preparing embroideries.

　　D．Inviting them to make cake flour.

　　解析：选C　细节理解题。根据第一段最后一句和最后一段的"Girls usually make embroideries (刺绣) and give them as gifts to their lovers."可知，欢迎游客的活动不包括C项。

　　3．The Miao people played the Lusheng and sang Miao songs at first to ________.

　　A．stop the robbers understanding them

　　B．show the robbers their power

　　C．challenge the Buyi people

　　D．please the robbers

　　解析：选A　细节理解题。根据第三段"The Miao people played ... the robbers couldn't understand them."可知选A项。

　　4．What can we learn about the "Siyueba" Festival?

　　A．It is a newly­formed festival.

　　B．It is only celebrated in Zhenshan Village.

　　C．It is popular with all the ethnic minorities.

　　D．It is a chance for young people to make friends.

　　解析：选D　细节理解题。根据文章最后一段中的"In Zhenshan, some young people take advantage of the festivals to make friends ..."可知，D项正确。

　　B

　　Heat has been used to control hair for hundreds of years. But how much is too much? If you've ever opened a very hot oven, you know that heat can burn your eyebrows off your face very quickly. A scientist from Purdue University in Indiana is trying to find a scientific answer on how hot is too hot when it comes to your hair.

Many women and some men are very particular about their hair. Some people who have naturally curly hair prefer to have it straightened. Others with straight hair want to have curls. Tahira Reid is one of those_people. As an African­American woman, she is familiar with the challenges of maintaining (保养) curly, coiled or tightly curled hair.