碘及其化合物在合成杀菌剂、药物等方面具有广泛用途．回答下列问题：

2016年4月19日，******在网络安全和信息化工作座谈会上强调指出，实现“两个百年”奋斗目标，需要全国各族人民心往一处想、劲往一处使。如果一个社会没有共同理想，没有共同目标，没有共同价值观，整天乱哄哄的，那就什么事也办不成。他同时强调，网络空间是亿万民众共同的精神家园。网络空间天朗气清、生态良好，符合人民利益。网络空间乌烟瘴气，生态恶化，不符合人民利益、实现我们的奋斗目标，网上网下要形成同心圆。

根据上述材料，结合所学知识，思考下列问题

运输公司安排大小不同的两辆卡车去运货．大卡车每次比小卡车多运8吨．两辆卡车分别运了3车，所运货物的总量是84吨．大卡车和小卡车每次各运货多少吨？

血量相对稳定，有利于人体维持正常的生理活动，一个人一次失血超过多少回危及生命（　　）

    Every day Miss Wang was busy and bored with her new job in a company. But the young girl was lucky to get a housework robot from her parents.

    Miss Wang's life became much e____ than before with the help of the robot. When she got up in the morning, breakfast was m____ already. The robot also ironed（熨烫）Miss Wang's dresses to make them smooth, and prepared a lunch box f____ her every day. As a r____, Miss Wang no l____ needed to get up early to do the housework and she could s____ in bed for an extra hour.

  While Miss Wang was at work, the robot would clean her flat. It would do the laundry, wash the dishes, sweep the f____ and make the bed. The robot also went shopping at the supermarket.

  When Miss Wang returned home from work, her flat would be as clean as a new one. A delicious d____ would be ready for her on the table. After that, Miss Wang could r____ for an hour or two watching her favorite TV programmes, leaving the robot to wash the dishes. Miss Wang was very h____ with her robot.