题目

氮气、羟基乙胺（HOCH2CH2NH2)和氮化镓都含氮元素，其用途非常广泛。回答下列问题： （1） 基态氮原子价层电子排布图为，其中电子能量最高的能级是。 （2） HOCH2CH2NH2所含非金属元素电负性由大到小顺序为，其中C和N的杂化方式均为HOCH2CH2NH2中∠HOC小于∠HNC，其原因是。 （3） HOCH2CH2NH2是一种常见的二齿配体，能和Co2+形成环状配离子。Co位于元素周期表中区，该环状配离子的配位原子为。 （4） 氮化镓为六方晶胞，其结构如图，When former American President Bill Clinton travelled to South Korea to visit President Kim Young Sam, he repeatedly referred to the Korean president's wife as Mrs. Kim. By mistake, President Clinton’ s advisers thought that Koreans have the same naming customs as the Japanese. Clinton had not been told that, in Korea, wives keep their family names. President Kim Young Sam's wife was named Sohn Myong Suk. Therefore, she should be addressed (称谓) as Mrs. Sohn.   President Clinton arrived in Korea directly after leaving Japan and had not changed his culture gears. His failure to follow Korean customs gave the impression that Korea was not as important to him as Japan.    In addition to Koreans, some Asian husbands and wives do not share the same family names. This practice often puzzles English-speaking teachers when talking with a pupil’s parents. They become puzzled about the student's correct last name. Placing the family name first is common among a number of Asian cultures.   Mexican naming customs are different as well. When a woman marries, she keeps her family name and adds her husband's name after the word de (of). This affects how they fill in forms in the United States. When requested to fill in a middle name, they generally write the father's family name. But Mexicans are addressed by the family name of the mother. This often causes puzzlement.   Here are a few ways to deal with such difficult situations: don’t always think that a married woman uses her husband's last name. Remember that in many Asian cultures, the order of first and last names is reversed. Ask which name a person would prefer to use. If the name is difficult to pronounce, admit it, and ask the person to help you say it correctly. 67. The story of Bill Clinton is used to__________.                           A. improve US-Korean relations                      B. introduce the topic of the text  C. describe his visit to Korea                         D. tell us how to address a person 68. The word "gears" in paragraph 2 is closest in meaning to_______.                 A. action plans                                             B. naming customs        C. travel maps                                              D. thinking patterns 69. When a woman marries in Korea, she ___________.                          A. continues to use her family name                      B. uses her husband's given name  C. shares her husband's family name                  D. adds her husband's given name to hers 70. To address a married woman properly, you'd better______.                     A. use her middle name                    B. use her husband's first name   C. ask her which name she likes               D. change the order of her names