Most of the measures F.D.Roosevelt took in the first hundred days he was in the White House were to（）

A . bimetallic type B . diaphragm type C . bourdon tube type D . resistance-temperature type

A . clearance；calipers B . sinking；bridge gauge C . diameter；bridge gauge D . clearance；lead wire

A . geographic pole and the magnetic pole B . lubber's line and true north C . horizontal and the magnetic line of force D . compass heading and the magnetic heading

A . bulwark B . deck line C . gunwale bar D . sheer strake

A . angle that the propeller makes with a free stream of water B . angle that the propeller makes with the surface of the water C . number of feet per revolution the propeller is designed to advance in still water without slip D . positive pressure resulting from the difference of the forces on both sides of the moving propeller in still water without sli

A . reset action B . proportional action C . two position action D . rate actio

A . metacentric height B . displacement C . righting moment D . inclining moment

A . metacentric height B . displacement C . righting moment D . inclining moment

A . the absolute pressure B . the gauge pressure C . the vacuum pressure D . the differential pressure

A . flash point B . upper explosive limit C . lower explosive limit D . fire point

A . a micrometer B . a bridge gauge C . a spanner D . a wrench

A . pyrometer B . bourdon gauge C . pneumercator D . manometer

A、 save American democracy and the capitalist system B、 check the worsening of the economic situation C、 help people tide over the difficulty D、increase American export

A．Y B．N C．NG

A．the slope of the demand curve B．the rate at which demand changes when price changes C．how responsive the quantity demanded is to changes in price D．the percentage-slope of the demand curv E．None of these correctly defines what price elasticity of demand measures．

A.the absolute pressure B.the gauge pressure C.the vacuum pressure D.the differential pressure

As the mountains sank, ocean water charged over the lowest arts of the remaining land, forming a series of twisting inlets and lagoons (咸水湖) . The highest parts of the former mountain range, nearest the shore, remained as islands. ______【47】Marine fossils found here were 225 feet above sea level, indicating the level of the shoreline prior to the glacier. The 2, 500-mile-long rocky coastline of Maine keeps watch over nearly two thousand islands. Many of these islands are tiny and uninhabited, but many are home to thriving communities. Mt. Desert Island is one of the largest, most beautiful of the Maine coast islands. Measuring 16 miles by 12 miles, Mt. Desert Island was essentially formed as two distinct islands. ______【48】. For years, Mt. Desert Island, particularly its major settlement, Bar Harbor, afforded summer homes for the wealthy. Recently though, Bar Harbor has become a rapidly growing arts community as well. But the best part of the island is the unspoiled forest land known as Acadia National Park. Because the island sits on the boundary line between the temperate (温带) and sub-Arctic zones, the island supports the plants and animals of both zones as well as beach, inland , and alpine (高山 的) plants. ______【49】The establishment of Acadia National Park in 1916 means that this natural reserve will be perpetually available to all people, not just the wealthy. Visitors to Acadia may receive nature instruction from the park naturalists as well as enjoy camping, cycling, and boating. Or they may choose to spend time at the archeological museum, learning about the Stone Age inhabitants of the island. The best view on Mt. Desert Island is from the top of Cadillac Mountain. ______【50】. From the summit, you can gaze back toward the mainland or out over the Atlantic Ocean and contemplate the beauty created by a retreating glacier. A. It also lies in a major bird migration lane and is a resting spot for many birds. B. Mt. Desert Island is one of the most famous of all of the islands left behind by the glacier. C. The wealthy residences of Mt. Desert Island selfishly keep it to themselves. D. The term comes from the activity of the Ice Age. E. This mountain rises 1, 532 feet, making it the highest mountain on the Atlantic seashore. F. It is split almost in half by Somes Sound, a deep and narrow stretch of water seven miles long. (46)

A．The focusing accuracy of the lens of the eye. B．Eye color and vision. C．Where the beams travel. D．The reflection of the retina.

A、Real estate returns. B、Growth stock prices. C、Commercial paper yields.

A、bank. B、Manufacturing company. C、Mature technology company.