【单选题】若a>b,且b为正数,则下列式子一定成立的是( )
【单选题】As there is less and less coal and oil, scientists are exploring new waysof making use of ______ energy, such as sunlight, wind and water for power andfuel.
【单选题】The student who was caught ______ in the exam has been removed from school.A.cheatB.cheatedC.che
A.
25. The student who was caught ______ in the exam has been removed from school. A.cheat
【单选题】美国是世界上最大的农产品出口国,其发展农业生产的优势条件有( ) 1地处热带,光热条件好 2农业人口比例高,劳动力充足 3土壤肥沃,水源丰富 4平原面积广,耕地多
【简答题】巴西是世界上最大的咖啡生产和出口国,其咖啡生产的农业地域类型为 ( ) A.郊区农业 B.商品谷物农业 C.热带雨林迁移农业 D.种植园农业 2.咖啡原产于非洲,18世纪20年代由荷兰人传到了拉美地区和世界其它地区。咖啡生产和咖啡文化传入拉美属于 ( ) A.扩展扩散 B.传染扩散 C.刺激扩散 D.迁移扩散
【单选题】The city will have trees and pollution. [ ]