摘要： The river which forms the eastern boundary of our farm has always played an important part in our lives. Without it we could not make a living. There 阅读全文

摘要： 28w/m 45errors Recent developments in astronomy have made it possible to detect planets in our won Milky Way and in other galaxies. This is a major ac 阅读全文

摘要： 打字练习： 27w/m 45errors We have been brought up to fear insects. We regard them as unnecessary creatures that do more harm than good. We continually wage 阅读全文

摘要： It was regrettable that such great issues had to be the thrust and parry of a general election. But at least the debate should be constructive.如此重大的问题 阅读全文

摘要： 30w/m 56errors The Scandinavian countries are much admired all over the world for their enlightened social policies. Sweden has evolved an excellent s 阅读全文

摘要： People have long known that nuts are part of a healthy diet.人们早就知道坚果是健康饮食的一部分。People, who you know well, can give you good advice, give you a differen 阅读全文

摘要： My cousin, Harry, keeps a large curiously-shaped bottle on permanent display in his study. Despite the fact that the bottle is tinted a delicate shade 阅读全文

摘要： （二）风险型决策方法 适用的条件 未来情况不止一种，管理者不知道到底哪种情况会发生，但知道每种情况发生的概率 常用方法： 决策树法：用树状图来描述各种方案在不同情况(或自然状态)下的收益，据此计算每种方案的期望收 益从而作出决策的方法 练习题： •为了适应市场的需要，某地提出了扩大电视机生产的两 阅读全文

摘要： The high-resolution photograph was taken with a 135-mm lens mounted on a digital SLR camera.这张高清照片是用一部安装了135毫米镜头的单反相机拍摄的。 Fingerprint scanners have fo 阅读全文

摘要： 22 76 Predicting the future is notoriously difficult. Who could have imagined, in the mid 1970s, for example, that by the end of the 20th century, com 阅读全文