填空题

The promise of finding long-term technological solutions to the problem of world food shortages seems difficult to fulfill. Many innovations(改革，创新) that were once heavily supported have since fallen by the wayside. The proposals themselves were technically (47) , but they proved to be economically unavailable and culturally unacceptable to their consumers.
One characteristic common to unsuccessful food innovations has been that, even with (48) support, they often have not been technologically (49) or culturally acceptable to the people for whom they had been developed. A successful new technology, therefore, must fit the entire socialcultural system in which it is to find a place.
The (50) of new food technologies depends on more than these technical and cultural (51) , economic factors and governmental policies also strongly influence the (52) success of any innovation. Economists in the Anglo-American tradition have taken the lead in investigating the economics of technological innovation. (Although they exaggerate in (53) that profitability is the key factor guiding technical change--they completely disregard the (54) effects of culture--they are correct in (55) the importance of profits). Most technological innovations in agriculture can be (56) used only by large landowners and are only adopted if these profit-oriented business people believe that the innovation will increase their incomes.

• A) fullyF) considerations K) substantial
• B) stressingG) adoption L) undoubtedly
• C) worshippingH) aggressive M) visible
• D) claimingI) extensive N) adapted
• E) revolvedJ) feasible O) ultimate