固体物质的溶解度和饱和溶液里溶质的质量分数只与____ 有关，而与溶剂质量无关．将100g质量分数为10%的食盐溶液变成质量分数为20%的食盐溶液，应蒸发掉____ g水．

商店里以同样的价格卖出了两件大衣，其中一件赚了$\frac{1}{10}$，一件亏了$\frac{1}{10}$，总体来讲这家商店是（　　）

如图所示，△ABE和△ADC是△ABC分别沿着AB，AC边翻折180°形成的，若∠1：∠2：∠3=28：5：3，则∠α的度数是    （       ）

    Children sometimes get sick(生病) and need to go to hospital. Some of them have to stay there for a few ____ (day). It is not good for them____ (think) about their sickness all day long. They need some other things to think about, so people ask animals ____ help. In some places, workers from zoos often ____(take) animals to visit children in hospital. They may bring a little dog or a  ____(cute) monkey with them. Children are ____ (exciting) to see them.

    ____ ，some children cannot get close to the animals. The animals may make their sickness get even____ (bad). How can we help these children? The hospitals get another good idea. They work with zoos to make movies. The movies are all about lovely animals. Children in hospital can watch these movies and learn the animals' ____ (live) habits. A man____(call) Denny Sanford made a TV network (网络)to show these movies. It is used in many hospitals in the US today.