Backlash against the law helped fuel the abolitionist movement and increased participation on the Underground Railroad.人们对此法案的强烈不满,为废奴运动火上浇油,也使得越来越多的人参与“地下铁路”逃亡.He began his own abolitionist newspaper,The North Star.他自己创...
Methane and propane are alkanes.甲烷和丙烷是烷烃。Its main components include propane, butane and butylene.主要成份是丙烷 、 丁烷、丁烯等.a propane gas cylinder丙烷气钢瓶Fuel propane is scented with mercaptan odourants for leak detection.燃料丙烷通常添加硫醇...
Methods Entomological classification principle and method and biogeographic theory are used.方法采用昆虫分类学原理和方法与生物地理学理论.Methods: Using entomological classification principals and method.方法采用昆虫分类学原理与方法.Methods: Using entomolog...