Social Sciences. In short, a two-mode is a hybrid vehicle that can operate in two distinct ways (modes). The first mode works much like a regular full hybrid. It is the second mode that makes the difference--where the hybrid system can adjust varying amounts of engine and motor function to meet very specific vehicle/task/traffic requirements.
Twain's first book, The Innocents Abroad, was published in 1869, The Adventures of Tom Sawyer in 1876, and The Adventures of Huckleberry Finn in 1885. He wrote 28 books and numerous short stories, letters and sketches. Mark Twain passed away on April 21, 1910, but has a following still today.
Twain joined the staff of the Virginia City Territorial Enterprise, and became an established reporter/humorist. In 1863, he adopted the pseudonym Mark Twain, derived from a river pilot term describing safe navigating conditions. In 1869 he published his first book of travel letters entitled Innocents Abroad.