题目

Directions: Read the following passage. Summarize the main idea and the main points of the passage in no more than 60 words. Use your own words as far as possible.Take care of your spine (脊柱)The spine stands at the center of your health, providing your body with structure and support. It also contains your spinal cord, a massive collection of nerves conveying electric signals from the rest of your body to your brain. Since your spine is so central to health, it's important to look after it.Maintain good posture (姿势)is one of the most important things you can do to keep you spine health下列说法错误的是（　　）A．胶体有吸附性B．将FeCl3稀溶液溶于冷水即可制得Fe（OH）3胶体C．胶体的分散质颗粒可以透过滤纸D．分散系中分散质粒子直径由大到小的顺序是：浊液、胶体、溶液