Example sentences of "that [be] know to [be] " in BNC.

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1 Well , note first of all that the various gases that are thought to have made up the early atmosphere contain most of the main elements that are known to be essential to life : carbon , nitrogen , sulphur , hydrogen , and oxygen — though the oxygen was not ‘ free ’ , but was combined for example with carbon in carbon monoxide .
2 Examinations need to be carried out only at infrequent intervals and in most cases only those aspects of the product or container that are known to be those most likely to undergo change need be examined .
3 The direct way to assess this is to feed the rodents with large doses of substances that are known to be innocuous .
4 You should also be suspicious of foods that are known to be potent allergens .
5 Rather than cutting out a whole range of foods , concentrate on the foods that are known to be problematic in eczema : milk , eggs , beef , chicken , food additives , oranges , lemons and other citrus fruits .
6 What is unfortunate today is that scientists are still trying to build science on foundations that are known to be inadequate .
7 ‘ Low risk ’ activity could transfer body fluids that are known to be infectious .
8 We know that the immune system in that disease produces immunoglobulins ( which are antibodies , in the spinal fluid , which is the fluid surrounding the brain and spinal chord ) product antibodies there in the way that normal people do not , and there 's evidence too that around the areas of damaged insulation in the central nervous system , which is the characteristic abnormality or lesion in this condition , there are cells that are known to be committed to making antibody , or to aiding the production of antibody .
9 The sample used was of large companies that were known to be at the leading edge in terms of corporate planning practices .
10 Thirdly , targeted industries should have markets that were known to be price and income elastic and would offer long-term growth , in contrast to the low value-added products that were the usual sources of stagnation in Asian economies .
11 There is no single , universally accepted type of service that is known to be more successful in the management of attempted suicide patients thin any other .
12 At no point on its way to Woodstock is it followed by a boundary that is known to be ancient .
13 If the interviewer is closely identified with some head-office group that is known to be contemplating a change that organization participants consider undesirable , he will need considerable skill to tell just how strongly particular schemas are held .
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