the term bit means

A . The sequence of events that produce a power pulse B . One rotation of the engine crankshaft C . One stroke of a piston D . All of the above

A . Pounds of force necessary to damage a container B . Total weight of a container and contents C . Weight of a container D . Weight of the contents of a container

A . To navigate intentionally B . To navigate intensely C . To navigate carefully D . To navigate completely

A . gained in the direction of the original course B . gained at right angles to the original course C . the ship moves sidewise from the original course awayfrom the transfer means the distance D . around the circumference of the turning circle

A . 正确 B . 错误

A . spilling B . leaking C . dumping D . All of the above

A . Land first sighted when vessel approaching from seaward B . Land last sighted when vessel leaving from a port C . in sight of one another when vessel underway D . in sight of an island during a ship on her voyage

A . delivering more air into the cylinder than it would normally receive during an ordinary charging process B . forcing the products of combustion out of the cylinder with the fresh air charge C . collecting the air charge at the cleaner D . combustion and expansion of hot ga

A . fuel oil B . sludge C . oil refuse D . All of the above

A . velocity of current in knots B . direction from which the current flows C . estimated current D . direction toward which the current flow

A . around the circumference of the turning circle B . gained at right angles to the original course C . gained in the direction of the original course D . or throw of a vessels stern from her line of advance upon putting the helm hard over

A . Length of the discharge pipe B . Height of the discharge pipe C . Difference between the discharge and suction pressures D . Sum of discharge and suction pressure

A.fuel oil only B.crude oil only C.liquefied petroleum gas D.petroleum oil of any kind

听力原文： A little airplane has given new meaning to the term "going hyper". The Hyper-X recently broke the record for air-breathing jet planes when it traveled at a hypersonic speed of seven times the speed of sound. That's about 5,000 miles per hour. At this speed, you'd get around the world-- flying along the equator-- in less than five hours. The Hyper-X is an unmanned, experimental aircraft just 12 feet long. It achieves hypersonic speed using a special sort of engine. Actually, engineers have been experimenting with such an engine since the 1960s. For an engine to bum fuel and produce energy, it needs oxygen. A jet engine, like those on passenger airplanes, gets oxygen from the air. A rocket engine typically goes faster but has to carry its own supply of oxygen. This special engine goes as fast as a rocket, but it doesn't have to carry its own oxygen supply. Its design allows it to extract oxygen from the air that flows through the engine. And it does so without letting the fast-moving air put out the combustion flames. A booster rocket carried the Hyper-X to an altitude of about 100,000 feet for its test flight. The aircraft's record-beating flight lasted just 11 seconds. In the future, engineers predict, airplanes equipped with such engines could transport cargo quickly and cheaply to the edge of space. Hypersonic airliners could carry passengers anywhere in the world in just a few hours. (36) A．How to develop a new airplane technology. B．Features and possible usages of a special engine. C．How to do experiment with dangerous engines. D．How to do experiment with unmanned airplanes.

A、长期债务 B、长期贷款 C、巨额债务

A．cutting B．into C．B．surgical D．removal E．C．surgical F．repair G．D．suture 此题为多项选择题。