题目

电子层数相同的三种元素X、Y、Z，已知其最高价氧化物对应水化物的酸性强弱为HXO4＞H2YO4＞H3ZO4．下列判断错误的是（ ）A. 气态氢化物的稳定性：HX＞H2Y＞ZH3 B. 原子半径：X＞Y＞ZC. 非金属性：X＞Y＞Z D. 单质氧化性：X＞Y＞Z 答案：【答案】B【解析】非金属性越强，最高价氧化物对应水化物的酸性越强，最高价氧化物对应水化物的酸性是：HXO4＞H2YO4＞H3ZO4，则非金属性X＞Y＞Z，结合元素周期律分析判断。A、非金属性越强，氢化物越稳定，由于非金属性X＞Y＞Z，所以气态氢化物的稳定性：HX＞H2Y＞ZH3，故A正确；B、同周期元素的原 第一部分：听力(共两节，满分30分) 第一节(共5小题；每小题1.5分，满分7.5分) 听下面5段对话。每段对话后面有一个小题，从题中所给的A、B、C三个选项中选出最佳选项。听完每段对话后，你都有10秒钟的时间来回答有关小题和阅读下一小题。每段对话仅读一遍。 1．What is the probable relationship between the two speakers? A．Salesman and customer． B．Doctor and nurse． C．Doctor and patient． 2．What does the man mean? A．Cold is a kind of serious illness． B．You needn't see a doctor for a cold C．Cold will go away quickly． 3．What did the man lose? A．He lost a book． B．He lost his suitcase． C．He lost his camera． 4．What do we know about the flight? A．There will be a short delay． B．The flight will be canceled． C．The plane will take off in the storm． 5．What do we know about Linda? A．She is forgetful． B．She has a gentle forgiving nature． C．She is careless． 第二节(共12小题；每小题1.5分，满分18分) 听下面4段对话或独白。每段对话或独白后有几个小题，从题中所给的A、B、C三个选项中选出最佳选项。听完每段对话或独白前，你将有时间阅读有关小题，每小题5秒钟；听完后，各小题将给出5秒钟的作答时间．每段对话或独白读两遍。 听第6段材料，回答第6－8题。 6．What's the relationship between the man and the woman? A．Wife and husband． B．Customers and waitress C．Friends． 7．What does the man want? A．Two large hamburgers and a large cup of cola． B．A large cup of cola, a small hamburger and a large one． C．A small cup of cola and two large hamburgers． 8．How much does the man pay? A．＄10． B．＄7． C．＄8.5． 听第7段材料，回答第9－11题。 9．Where did the conversation happen? A．In a restaurant． B．In a hotel． C．In a supermarket． 10．How much did the man pay? A．＄402． B．＄320． C．＄230． 11．How did the man pay? A．In cash B．By check C．On line． 听第8段材料，回答第12－14题。 12．What does the woman want to do? A．She wants to lose weight． B．She wants to keep fit by taking medicine． C．She wants to be a personal trainer． 13．Which of the following is not true about the personal trainer? A．Making suitable exercise plans for customers． B．Teaching customers all the techniques． C．Helping customers buy suitable equipment． 14．At what time can the woman go to the club? A．At 8 aa m. on Saturday． B．At 11 a. m. on Monday． C．At 7 a. m. on Friday． 听第9段材料，回答第15－17题。 15．Why did Gerry's face look pretty bad? A．He got burnt in beach chair． B．He got burnt while surfing． C．He got burnt while swimming． 16．What did Gerry think of surfing? A．Easy． B．Difficult． C．Not mentioned． 17．What do we know about Bonnie? A．Her face got burnt too． B．She didn't enjoy her holiday． C．She protected herself from the sun． 第三节(共3小题；每小题1.5分，满分4.5) 请听下面一段独白，用所听到的独白中的词或数填空，每空限填一个词或一个数，在听本段独白前，你将有时间阅读各小题，每小题5秒钟；听完后，各小题将给出5秒钟的作答时间，本段独白读两遍。 听第10段材料，回答第18－20题