【简答题】阅读理解。 The Inventions Paper was first made in the year 105. It was made by a Chinese named Cai Lun. For over 500 years paper was made only in China. People in Japan learned of paper around the year 600...
【判断题】在肺循环中,右心室和肺动脉里面的血液是静脉血,富含二氧化碳和代谢产物。
【判断题】在肺循环中,右心室和肺动脉里面的血液是动脉血,富含氧气和营养物质。
【简答题】参看课本127页“经济区与都会”,对应填写图中1__________、2__________、3__________、4__________、5__________所指向的古地名。
【简答题】完形填空。 Paper was first invented by a Chinese man called Cai Lun in 105 AD. He made it __1__ the wood of a kind of tree. Today, paper still __2_____ from trees. We use __3_ paper every day. We must begi...
【单选题】下面关于鲫鱼血液循环系统中血管及管内流动的血液之间关系的判断中正确的是( )
【判断题】在肺循环中,肺静脉和左心房里面的血液是动脉血,富含氧气和营养物质。
【多选题】Before the paper was invented, Chinese characters were written on .