提取物
参考答案：
植物纤维原料中的非细胞壁物质通常指存在于细胞腔和细胞间隙的、不参与细胞壁结构的物质，大部分可溶于中性有机溶剂或水，又称提取物。
根据下面的对话情景，在每个空白处填上一个适当的句子，使对话的意思连贯、完整。
A: Do you agree that computers have been very important in people's lives these days?
B: 1______________. And many people think they will be used even more widely in the future.
A: 2______________?
B: For looking up information, reading books and playing games.
A: 3______________?
B: Yes, I do. It's easy and convenient to shop online. I can save a lot of time by doing that.
A: That's true. However, sometimes it isn't safe to buy things online.
B: So we should be careful to shop online. 4______________?
A: I like watching movies and chatting online.
B: 5______________.
A: Sure. I have about 10 e-pals (网友) who are from different countries.
B: That sounds interesting.
下列土地登记，不属于其他登记的是( )。
A．更正登记
B．异议登记
C．注销登记
D．预告登记
