更多"Flax has been raised for many thous"的相关试题:
[单项选择]Flax has been raised for many thousands of years, for many different reasons. Probably the two most important reasons are for the fabric made from it and the oil produced from it. The woody stem of the flax plant contains the long, strong fibers that are used to make linen. The seeds are rich in an oil important for its industrial uses.
The people of ancient Egypt, Assyria, and Mesopotamia raised flax for cloth; Egyptian mummies were wrapped in linen. Since the discovery of its drying ability, the oil from flaxseed, called linseed oil, has been used as a drying agent in paints and varnishes.
The best fiber and the best seed cannot be obtained from the same kinds of plant. Fiber flax grows tall and has few branches. It needs a short, cool growing season with plenty of rainfall evenly distributed. Otherwise, the plants become woody and the fiber is rough and dry. On the other hand, seed flax grows well in places that are too dry for fiber flax. The plants are lower to the groun
A. How Mummies Were Preserved.
B. The Many Uses of the Flax Plant.
C. The Difference Between Seeds and Fibers.
D. The Types of Plant Life Around the World.
[填空题]How many years has she been married
She has been married （）.
[单项选择]How many years has the company been operating
A. 15 years
B. 20 years
C. 25 years
D. 30 years
[单项选择]For many years the city has been a business center with hotel accomodation mainly for businessmen together with other ______ travellers and completely inadequate for the swarms of short-stay tourists landing in the city.
A. affluent
B. agonistic
C. afferent
D. amicable
[单项选择]
How many years has Joaquin Chanque May been living in Spain
[单项选择]How many years has this advertising man been in the ad. business for
A. Fifteen years.
B. Sixteen years.
C. Fourteen years.
D. Ten years.
[单项选择]In the last ten years, there have been many changes in family life. Are these changes （）
A. for better or for worse
B. for the better or for the worse
C. for the best or for the worst
D. for the good or for the bad
[填空题]He has been working in this city for many years. So he_______________________________________________(对这儿的一切很熟悉).
[单项选择]In recent years much more emphasis has been put （） developing the students creative skills.
A. onto
B. in
C. over
D. on
[单项选择]In the past ______ years, the economy has been growing owing to tax cuts and Federal Reserve interest rate cuts.
A. 2
B. 3
C. 4
D. 5
[单项选择]She has been in Tianjin for ten years. Tianjin has become her second ______.
A. house
B. family
C. hometown
[单项选择]In recent years the climate has been generally cool in northern Asia. But during periods when the average daily temperature and humidity in northern Asia were slightly higher than their normal levels the yields of most crops grown there increased significantly. In the next century, the increased average daily temperature and humidity attained during those periods are expected to become the norm. Yet scientists predict that the yearly yields of most of the region’s crops will decrease during the next century.
Which one of the following, if true, most helps to resolve the apparent paradox in the information above
A. Crop yields in southern Asia are expected to remain constant even after the average daily temperature and humidity there increase from recent levels.
B. Any increases in temperature and humidity would be accompanied by higher levels of atmospheric carbon dioxide, which is vital to plant respiration.
C. The climate in northern Asia has generally been too cool and dry in recent years for populations of many crop insect pests to become established.
D. In many parts of Asia, the increased annual precipitation that would result from warmer and wetter climates would cause most edible plant species to flourish.
E. (E) The recent climate of northern Asia prevents many crops from being farmed there during the winter.
