问题
选择题
在一个密闭容器内有4种物质，在一定条件下充分反应，测得反应前后各物质的质量，数据见下表。
下列说法正确的是[ ]
A．无论甲、丙的待测值为多少，甲、丙一定都是反应物
B．如果丙的待测值为0，则只有乙、丁是生成物
C．如果丙的待测值为10，则该反应为分解反应
D．如果甲的待测值为0，则参加反应的甲、丙的质量比为2:5
答案
答案：C
搜题请搜索小程序“爱下问搜题”
在一个密闭容器内有4种物质，在一定条件下充分反应，测得反应前后各物质的质量，数据见下表。
下列说法正确的是[ ]
A．无论甲、丙的待测值为多少，甲、丙一定都是反应物
B．如果丙的待测值为0，则只有乙、丁是生成物
C．如果丙的待测值为10，则该反应为分解反应
D．如果甲的待测值为0，则参加反应的甲、丙的质量比为2:5
答案：C
| 完形填空 | ||||
| Every morning, before dropping her son off at school, my friend would stop on the way to work to grab a quick breakfast. They tended to frequent the__1__restaurant every morning grabbing an egg sandwich, juice, coffee for herself, milk for her son. One day she__2__an additional breakfast. When they had eaten and walked out of the door, she stopped and said good morning to a__3__man who was sitting alone outside the restaurant and__4__him the additional breakfast she had bought.He__5__her, grinning, telling her it was the first meal he had in a great many days. She couldn't help but feel__6__and was glad she finally took action. She told her son that she had__7__him every day that week outside the restaurant and that no one, herself included, had__8__to offer him food, drink, comfort, etc. She further__9__that homelessness can happen to anyone and the importance of service to others and__10__acts of kindness were. And so__11__her kindness tradition...each day thereafter she and her son__12__to buy and supply the homeless gentleman with breakfast. The__13__was going on until they__14__several years later but the lesson was__15__implanted (植入) in her son by then. She__16__as she told me that this kindness legacy__17__to her son, who remembered this childhood tradition and lesson. Now a college graduate and__18__employed, her son stops every day at Starbucks for his morning cup of coffee and purchases a__19__for a homeless person nearby before commuting (上下班往返) to the__20__. What a great family legacy that he can pass along to his children as well... | ||||
|