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关于法律事实的说法正确的是()。
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Boeing Co's Sonic Cruiser, a proposed faster airliner, would be mostly blended material, program director Walt Gillette said recently. In its quest for the 【21】______ to fly 15 to 20 per cent faster than 【22】______ airliners, the US company says about 60 per cent of the new plane's 【23】______, including the wing, would be a carbon-fiber-reinforced composite material that is lighter than aluminum for the same 【24】______. "Composites would 【25】______ almost all of the airplane that you could see from the outside," Gillette said. Composites are well regarded among aeronautical engineers and have been in 【26】______ use since the 1970s. Each generation of planes has more composites, and Gillette 【27】______ that about 10 per cent of Boeing's 【28】______ civil aircraft, the early-1990s 777, is built 【29】______the material. 【30】______still only a proposal, the Sonic Cruiser has 【31】______ the interest of many airlines, which expressed unusual enthusiasm for the aircraft 【32】______the September 11 attacks forced most of them to scale back operations. When Boeing 【33】______the Sonic Cruiser last year it said the plane might enter service 【34】______2006 and 2008. Gillette said the 【35】______ date now is 2008, by which time the market and technology are expected to have developed 【36】______Wind-tunnel tests 【37】______ the company's computer calculations of optimal cruising speed for the plane at 95 to 98 per. cent of the speed of sound. Going faster than sound would use too much fuel and 【38】______ great 【39】______ on the aircraft's engines. Gillette said the Sonic Cruiser 【40】______be offered as a family of aircraft with 200 to 250 seats and a range of 6,500 to 9,000 nautical miles (12,000 to 16,700 kilometers).
【21】
适合于挖掘淤泥、砾石、卵石和种性土，而不适合挖掘细砂和粉砂土的挖泥船是()．
我国国务院金融监督管理机构跟踪发现某银行近期吸纳了一笔巨款，且经调查该帐户为匿名账户，疑似洗钱活动，那么这属于洗钱的()。
Natural foods, for example, are vegetable, fruit and grain which have been grown in soil and are rich in organic matter. In simple terms, this means that the soil has been nourished by unused vegetable matter, which provides it with essential vitamins and minerals. This in itself is a natural process compared with the use of chemicals and fertilizers, the main purpose of which is to increase the a-mount—but not the quality--of foods grown in commercial farming areas.
Natural foods also include animals which have been allowed to feed and move freely in healthy pastures. Compare this with what happens in the mass production of poultry: there are battery farm, for example, where thousands of chickens live crowded together in one building and are fed on food which is little better than rubbish. Chickens kept in this way are not only tasteless as food; they also produce eggs which lack important vitamins.
There are other aspects of healthy eating which are now receiving increasing attention from experts on diet. Take, for example, the question of sugar. This is actually a nonessential food! Although a natural alternative, such as honey, can be used to sweeten food if it is necessary, we can in fact do without it. It is not that sugar is harmful in itself. But it does seem to be addictive: the quantity we use has grown steadily over the last two centuries and in Britain today each person consumes an average of 200 pounds a year! Yet all it does is to provide us with energy, in the form. of calories. There are no vitamins in it, no minerals, and no fibre.
It is significant that nowadays fibre is considered to be an important part of a healthy diet. In white bread, for example, the fibre has been removed. But it is present in unrefined flour and of course in vegetables. It is interesting to note that in countries where the national diet contains large quantities of unrefined flour and vegetables, certain diseases are comparatively rare. Hence the emphasis is placed on the eating of wholemeal bread and more vegetables by modem experts in "healthy eating".
This passage is mainly concerned with ______.
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