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• 2200人已做

680

【句子改错SC】-8457-OG16

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.

• 1658人已做

600

【句子改错SC】-8458-OG16

Manufacturers rate batteries in watt-hours; if they rate the watt-hour higher, the longer the battery can be expected to last.

• 627人已做

650

【句子改错SC】-8459-OG16

Although a surge in retail sales have raised hopes that there is a recovery finally under way, many economists say that without a large amount of spending the recovery might not last.

• 1476人已做

600

【句子改错SC】-8460-OG16

Although a surge in retail sales have raised hopes that there is a recovery finally under way, many economists say that without a large amount of spending the recovery might not last.

• 1903人已做

600

【句子改错SC】-8461-OG16

At the end of the 1930s, Duke Ellington was looking for a composer to assist him-someone not only who could arrange music for his successful big band, but mirroring his eccentric writing style as well in order to finish the many pieces he had started but never completed.

• 1649人已做

650

【句子改错SC】-8462-OG16

Of all the vast tides of migration that have swept through history, maybe none is more concentrated as the wave that brought 12 million immigrants onto American shores in little more than three decades.

• 1711人已做

600

【句子改错SC】-8463-OG16

Diabetes, together with its serious complications, ranks as the nation’s third leading cause of death, surpassed only by heart disease and cancer.

• 1684人已做

650

【句子改错SC】-8464-OG16

The intricate structure of the compound insect eye, having hundreds of miniature eyes called ommatidia, help explain why scientists have assumed that it evolved independently of the vertebrate eye.

• 1506人已做

650

【句子改错SC】-8465-OG16

In late 1997, the chambers inside the pyramid of the Pharaoh Menkaure at Giza were closed to visitors for cleaning and repair due to moisture exhaled by tourists, which raised its humidity to such levels so that salt from the stone was crystallizing and fungus was growing on the walls.

• 1685人已做

650

【句子改错SC】-8466-OG16

In 1979 lack of rain reduced India’s rice production to about 41 million tons, nearly 25 percent less than those of the 1978 harvest.

Chris老师：1746295647

• 【问题求解PS】-14339

A certain basket contains 10 apples, 7 of which are red and 3 of which are green.  If 3 different&nb...

70人做过-1条评论-74.3%正确率

• 【句子改错SC】-10150

Restorers say that if allowed to remove and replace the discolored layer of varnish on the Mona Lisa, thecolors Leonardo da Vinci painted nearly five hundred years ago will once again shine through.

403人做过-2条评论-60.3%正确率

• 【问题求解PS】-12942

In the figure shown, the length of line segment QS is $$4\sqrt{3}$$. What is the perimeter of equilateral triangle PQR?

34人做过-2条评论-70.6%正确率

• 【数据充分DS】-13745

A scientist recorded the number of eggs in each of 10 birds’ nests.  What was the standard deviation of...

24人做过-1条评论-75%正确率

• 【数据充分DS】-11793

If n and t are positive integers, what is the greatest prime factor of the product nt ? (1) The&nbs...

132人做过-4条评论-54.5%正确率

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