题目

普通水泥在固化过程中其自由水分子减少并形成碱性溶液。根据这一物理化学特点，科学家发明了电动势法测水泥的初凝时间。此法的原理如图所示，总反应为2Cu＋Ag2O===Cu2O＋2Ag。下列有关说法正确的是( ) A．2 mol Cu与1 mol Ag2O的总能量低于1 mol Cu2O与2 mol Ag的总能量 B．负极的电极反应式为2Cu＋2OH－－2e－===Cu2O＋H2O C．测量原理示意图中，电流方向从Cu→Ag2O D．电池工作时，OH－向正极移动 阅读理解 　　For many people, the name Baskin-Robbins is linked to sweet memories of eating ice cream．Irvine Robbins, who helped create this famous company, died in May at the age of ninety．His life's work of making fun and exciting ice cream flavors changed the way Americans enjoy this food． 　　Irvine Robbins opened his first ice cream store in 1945 in California．At the time, there were no stores that sold only ice cream．His sister's husband, Burton Baskin, also opened his own ice cream stores． 　　In 1948 they combined their six stores into one business．Baskin and Robbins realized that they were too busy to operate each store well．So, they decided to sell part of each operation to the manager of that store．This permitted the company to grow quickly． 　　By 1953, they renamed their company Baskin-Robbins．They advertised that they sold 31 kinds of ice cream to show the many choices buyers had．There was one flavor for every day of the month． 　　Robbins and Baskin sold "Lunar Cheesecake" the day after astronauts landed on the moon in 1969．Other flavors included "ChaChaCha", for cherry chocolate chip, and Robbins' personal favorile "Jamoca Almond Fudge"．They said："We sell fun, not just ice cream．" 　　By 1967, there were 500 Baskin-Robbins stores in the United States．The business partners sold their company that year．Today, there are more than 5,800 Baskin-Robbins stores around the world． (1) What is the main idea of the passage? [　　] A． The managers of Baskin-Robbins． B． The start of Baskin-Robbins． C． The production of Baskin Robbins． D． The great success of Baskin-Robbins． (2) From the text we learn that _________． [　　] A． Baskin-Robbins was the only shop selling ice cream in 1945 B． Baskin-Robbins was famous for their special ice cream flavors C． Baskin-Robbins grew quickly because they combined their other stores together D． there had been more than 5,800 Baskin-Robbins stores around the world by 1967 (3) What was probably the main reason for Baskin-Robbins' success? [　　] A． They sold not only ice cream, but fun． B． They renamed their company． C． They put all their hearts into the business． D． They sold "Lunar Cheesecake"． (4) It can be inferred from Paragraph 5 that [　　] A． Jamoca Almond Fudge is Baskins' favourite B． Cherry chocolate chip sells best C． Robbins and Baskin were good at inventing new ice creams D． Lunar cheesecake was invented for the astronauts