一个几何体的三个视图都是等腰直角三角形（如图），且直角边长为1， 则此几何体的体积为 .
对农作物进行估产属于遥感应用的哪一领域[ ] A.资源普查B.灾害监测C.环境监测D.工程建设及规划
Could you tell me when__? A. he is coming B. he was comingC. will he comeD. is he coming
下列对地理之最的叙述，错误的是( ) A.喜马拉雅山是世界最高大的山脉 B.珠穆朗玛峰是世界海拔最高的山峰 C.青藏高原是世界最高的高原 D.西
Hundreds of years ago, Native-American tribes lived in Mexico. The Aztecs built beautiful cities. They had a calendar (历法) and a written language. However, the Spanish destroyed the Aztecs in l521
Is there anything else ____ you want to get ready for the party this evening? A. which B. that C. who D. what
—I’ll be away for a long time. —Don’t worry. She can look after your pet ________. A. careful enough B. enough careful C. carefully enough D. enou
