gmat og11黃皮正確句子138(三).

21. Paleontologists believe that fragments of a primate jawbone unearthed in Burma and estimated to be 40 to 44 million years old provide evidence of a crucial step along the evolutionary path that led to human beings.

22. The end of the eighteenth century saw the emergence of prize-stock breeding, with individual bulls and cows receiving awards, fetching unprecedented prices, and exciting enormous interest whenever they were put on show.

23. Of all the possible disasters that threaten American agriculture, the possibility of an adverse change in climate is probably the most difficult to analyze.

24. For members of the seventeenth-century Ashanti nation in Africa, animal-hide shields with wooden frames were essential items of military equipment, protecting warriors against enemy arrows and spears.

25. The golden crab of the Gulf of Mexico has not been fished commercially in great numbers, primarily because it lives at great depths-2,500 to 3,000 feet down.

26. Galileo was convinced that natural phenomena, as manifestations of the laws of physics, would appear the same to someone on the deck of a ship moving smoothly and uniformly through the water as to a person standing on land.

27. Health officials estimate that 35 million Africans are in danger of contracting trypanosomiasis, or "African sleeping sickness," a parasitic disease spread by the bites of tsetse flies.

28. Beyond the immediate cash flow crisis that the museum faces, its survival depends on whether it can broaden its membership and leave its cramped quarters for a site where it can store and exhibit its more than 12,000 artifacts.

29. Along with the drop in producer prices announced yesterday, the strong retail sales figures released today seem to indicate that the economy, although growing slowly, is not nearing a recession.

30. An inventory equal to 90 days sales is as much as even the strongest businesses carry, and then only as a way to anticipate higher prices or ensure

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