在直角三角形ABC中，∠ACB=90°，AC=BC=2，点P是斜边AB上的一个三等分点，则$\overrightarrow{CP}$$·$$\overrightarrow{CB}$+$\overrightarrow{CP}$$·$$\overrightarrow{CA}$=____

晶体在凝固过程中，要不断放出热量，温度不变．　　（判断对错）

   My hobby is table tennis.____  table tennis is an energetic activity. I know it isn’t very ____ .but I find it very interesting .I am good at table tennis and I enjoy my____  when I win a game. In my free time, I like reading. I like to sit down with a book. When I read, I ____ what’s____ ,and how the people feel.

Put my ruler in the pencil box.