题目

过曲线上一点的切线方程为（   ） A、                                                                      B、                          C、                                                      D、 答案：D 解析:当点A为切点时，所求的切线方程为，当A点不是切点时，所求的切线方程为故选D。阅读下面短文，在空白处填入一个适当的词，或填入括号中所给单词的正确形式。Here are several kinds of 1.(tradition) Chinese food：Noodles are a symbol 2. long life in Chinese culture.Since noodles mean long life，it is 3.(consider) very unlucky to cut it off.In China a whole fish is a symbol of 4.(rich)．In fact，at a party it is a tradition to serve the whole fish last.Fish also has a special meaning 5. the Chinese word for fish，“yu”，sounds like the word for richness or plenty，and it is 6.(believe) that eating fish will help your wish come true.A very popular dish is zongzi during 7. Dragon Boat Festival.This dish is 8.(make) of rice dumplings with meat or other delicious food in bamboo 9.(leaf)．The tradition of eating zongzi is meant 10.(remind) us of a great man，Qu Yuan，in Chinese history. 1.traditional 2.of 3.considered 4.richness 5.because 6.believed 7.the 8.made 9.leaves 10.to remind 【解析】 文章大意：本题主要介绍了三种传统的中国食物：面条、鱼和粽子。面条是长寿的标志，鱼是富裕的象征；粽子是为了纪念屈原的。 1...