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句法结构   题数:403
【OG18-P680-668题】In a review of 2,000 studies of human behavior that date back to the 1940s, two Swiss psychologists, declaring that since most of the studies had failed to control for such variables as social class and family size, none could be taken seriously.
Leaching, the recovery of copper from the drainage water of mines, as a method of the extraction of minerals, it was well established as early as the eighteenth century, but until about 25 years ago miners did not realize that bacteria take an active part in the process.
Now generally regarded as a forgery, the Kensington Rune Stone, a 90-kilogram slab of inscribed rock discovered in Minnesota in 1898, was said to have recorded an encounter between Native Americans and Norse explorers in 1362 and thus was cited as evidence that Europeans explored North America in pre-Columbian times.
Whereas the honeybee’s stinger is heavily barbed and cannot be retracted from the skin, because the yellow jacket has a comparatively smooth stinger, it is therefore able to be pulled out and used again.
Polio, although it is eradicated in the United States, it continues elsewhere and is able to be brought into the country by visitors.
The Anasazi settlements at Chaco Canyon were built on a spectacular scale, with more than 75 carefully engineered structures, of up to 600 rooms each, were connected by a complex regional system of roads.
Oaks preferring drier ones, pine trees thrive in relatively wet climates.
Although schistosomiasis is not often fatal, it is so debilitating that it has become an economic drain on many developing countries.
By merging its two publishing divisions, the company will increase their share of the country’s $21 billion book market from 6 percent to 10 percent, a market ranging from obscure textbooks to mass-market paperbacks.
Though the artifacts of pre-Columbian civilization created a stir from the very first European contacts with the New World in the sixteenth century, it was not until the latter half of the nineteenth century that Western designers, artists, and crafters were inspired to imitate them.
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