Submarines have been a little mysterious since they were invented more than two centuries ago. That's because most submarines have been owned by the military. But recently, subs have started to get friendlier. There is a growing market for personal subs, and many coastal resort areas now have...
(A "league" is an old word?(1)about three miles.) In those days submarines had not been(2), but he describes an underwater ship very like a modern submarine. The captain of the submarine, called Captain Nemo, and his men have many strange adventures and find many strange things?(3)...
The Turtle Submarine may not have been effective, but it was an important first step toward submersible craft. It showed the feasibility of underwater craft, and while it never succeeded in an attack, formed the basis for future submarines. It was the first submarine to use water and lead ...
Our tale begins in the summer of 1942. President Roosevelt and Prime Minister Churchill had just met over recent attacks off of the Atlantic seaboard and in the Caribbean where Axis submarine attacks were seriously hurting the Allied effort. If this kept up, the tide of the war might turn in...
Nothing gets into or out of the submarine except through the hatches (舱口) , and nothing gets into or out of a cell except through "gates" in its cell membrane.What can be said about cell first? It is that they are very small. Your body has about 100 trillion ...
A ship’s radar can only detect objects in the air or on the surface of the water, including the periscope of a submarine, but not the sub itself. That would need sonar. Your mind is more like radar and can’t detect stuff deep in your psyche. Therapy attempts to be like sonar but...
It has been written in English which you can easily read. The book, has been made into a film. 【1】 A. meaning B. including C. referring D. speaking 【2】 A. made B. discovered C. produced D. invented 【3】 A. ship B. boat C. plane D. submarine 【4】 A. is made B. is...
Deep-ocean Submarine Here is another project developed by Minnesota's own General Mills and their Electronics Group, the first of its kind deep-ocean submersible called 'Alvin' was put into service in 1964, the small research sub can carry two passengers and has done over 5,000 dives and ha...
Having recently served as the medical officer of a Royal Navy nuclear powered submarine, sometimes isolated for up to 12 weeks without communications, I wa... FJH Brims - 《Bmj British Medical Journal》 被引量: 1发表: 2002年 Sustainers Close a Memorable Year answer our nation's call. While...
Other international bodies during the nineteenth century met to dis- cuss such issues as fishing zones, the opium trade, and submarine cables. Then came the Versailles Conference of 1919, which redrew some national boundaries and adopted provisions for the League of Nations, an organi- zation ...