问题 选择题

下列各项表述正确的是

A.次氯酸的电子式:

B.表示中和热的热化学方程式:NaOH(aq)+HF(aq)=NaF(aq)+H2O(l)△H=-57.3kJ/mol

C.H2S电离的方程式为:H2S 2H++S2-

D.标准状况下,1.12L16O2和1.12L18O2均含有0.1NA个氧原子

答案

答案:D

选择题
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Lillian Hanson, a college student, expects to graduate in about two years. What makes Mrs. Hanson different from her classmates is her age-----73 years. She has been studying at college, a few courses at a time, for 27 years.

  When Lillian Hanson graduated from high school, she went to the bank to borrow money for further education. The banker gave her no encouragement. He didn’t think that a country girl should borrow money to go to college. He thought she should be at home doing work in the house or around the farm. So Lillian Hanson went home and raised a family of nine children instead of going to college. Mrs. Hanson never forgot her dream of getting a higher education. When her children were grown, she tried again.

  She finds that it is the hardest part of going back to school at her age to sit in class for long periods of time. Because she is not as quick as she used to be, Mrs. Hanson often gets up and walks around classes to keep from getting stiff(不灵活). At the beginning of a course in using the computer, the other students all stood up to give her a warm welcome when she introduced herself and explained why she was there and what her aims were.

49. Mrs. Hanson couldn’t go to college immediately after she graduated from high school because ____________.

A. she hadn’t got enough money

B. she was a country girl

C. the banker ordered her not to borrow any money

D. the banker thought she should raise a family of nine children

50. The computer students welcomed Mrs. Hanson warmly because ______.

 A. she had got an excellent result in the exam

B. she was good at telling funny stories

 C. they wanted to get her help in their studies

D. they were deeply moved by her spirit

51. Mrs. Hanson is the sort of person who ________.

  A. cares for study very much

B. likes to borrow money from the bank

  C. never misses a chance to talk

D. tries to save any money for her family

52. In which order did Mrs. Hanson do the following things?

  a. she began her studies at college.

  b. She finished high school.

  c. She got married and gave birth of nine children.

  d. She had her 73 rd birthday.

  e. She went to the bank to borrow money.

  A. a c b e d      B. b e c a d   C. b c e d a    D. e d a c b