下列不属于克隆技术的是（　　）

“生物圈Ⅱ号”实验的失败带给我们的启示是（　　）

 

某链状有机物分子中含m个、n个－CH₂－、X个－CH₃，则X的数目可能是

在容积为1.00L的容器中，通入一定量的N₂O₄，发生反应N₂O₄（g）⇌2NO₂（g），随温度升高，混合气体的颜色变深．回答下列问题：

阅读短文，下列问题
    Have you been asked for money by some disabled beggars(乞丐)while you're enjoying shopping? Doyou have any pity on them who are so poor and lonely or do you just feel afraidof their terrible shapes? As one of the most special groups，disabled people's living conditions-not only their material(物质的)conditions, but their mental(精神的)world, really need improvement.

    The treatment for disabled people should go like this: First, don't look down uponthem. Don't be afraid of looking at the terrible shapes of the disabled. Try to treat them equally. Because they are a part of the society(社会), we can't discard(抛弃)them. The second is to help them as much as we could. If you can be a volunteer and do some work for the disabled people, that would be very nice. That does help not only to the disabled people but also toyourself because you will feel good after your kind action.

    If every one of us gives a little love, the world will become a beautiful wonderland!