问题
问答题 简答题
试述酸的通性？
答案
参考答案：
1具有酸性。在水溶液中能电离出氢离子，能使指示剂如石蕊变色
2能与碱起中和反应生成盐和水
3能与某些金属作用生成氢气和盐。
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试述酸的通性？
参考答案：
1具有酸性。在水溶液中能电离出氢离子，能使指示剂如石蕊变色
2能与碱起中和反应生成盐和水
3能与某些金属作用生成氢气和盐。
| 阅读理解，信息归纳。 | |||||
| Last Tuesday, a little girl died after eating some fried chicken. Her father bought the chicken for her from a street seller in Fenzhuang Village, Fengtai, Beijing. After testing the girl, the doctor said she was poisoned (中毒) by nitrites (亚硝酸盐). Some experts suggest that we should buy foods with QS signs. They are safer. After hearing about the accident, many people feel more worried about the food safety because there have been many food safety problems in our country these years. For example, poisonous (有毒的) rice, oil, milk and so on have been found out recently. People feel quite afraid because these poisonous foods are rather bad for their health and even kill them. They want the government to do something to stop such poisonous foods and drinks appearing again so that they can have safe and healthy foods and drinks. | |||||
|
已知两公司都希望筹措3年期5 000万美元的资金，其中A公司计划筹措浮动利率美元资金，而B公司计划筹措固定利率美元资金。两公司的6个月筹资利率如下表所示：
| A公司 | B公司 | |
| 固定利率筹资利率(6个月期) | 8.30% | 9.72% |
| 浮动利率筹资利率(6个月期) | 6个月LIBOR+0.25% | 6个月LIBOR+1.20% |