题型:问答题 在Ⅱ栏中找出与I 栏对应的答句。 I ( ) 1. Do you go to the shop every day? ( ) 2. What time is it now? ( ) 3. Where's the cat? ( ) 4. Can he have a look? ( ) 5. Whose book is this? ( ) 6. I'm sorry I'm late. ( ) 7. What time do you go to school? ( ) 8. Sit down, please. ( ) 9. Must I go now? ( ) 10. What can you see in the picture? II A. That's all right. B. At six thirty. C. My book. D. Thank you. E. Yes, you must. F. It's seven. G. No, I don't. H. I can see a dog. I. Yes, he can. J. It's under the bed. 查看答案
题型:问答题 放射性同位素14C在考古中有重要应用,测得化石中14C残存量,可推算出化石的年代.为了研究14C的衰变规律,将一个原来静止的14C原子核放在匀强磁场中,观察到它所放射的粒子与反冲核的径迹是两个外切的圆,半径之比R∶r=5∶1,如图22-4-2所示.那么14C的衰变方程式应是下列给定的四个方程中的( )图22-4-2A.C→Be+HeB.C→B+e C.C→N+eD.C→B+H 查看答案
题型:问答题 患者男性,45岁。患冠心病10年余,间断胸闷1周,1天前于夜间突然被迫坐起,频繁咳嗽,严重气急,咳大量粉红色泡沫痰。该患者目前首要的护理问题是A.活动无耐力B.恐惧C.气体交换受损D.潜在并发症:心源性休克E.体液过多 查看答案