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A B C

is first mentioned in treatises of that period.

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23. Paleontologists have examined fossil embryos and hatchlings from three type of

A B C

duck-billed dinosaurs to figure out how they matured.

D

24. Lightning tends to strike the nearest good conductor, and hence often strikes in same

A B C

place more than once.

D

25. When study different cultures and societies, anthropologists often focus on marriage

A B

as a contractual agreement between different parties.

C D

26. The first piloted balloon flight across the Atlantic Ocean took place at 1978.

A B C D

27. The Arts and Crafts Movement of the late nineteenth century strove to revitalizing

A

handicrafts and applied arts during an era of increasing mass production.

B C D

28. When canned using proper methods, food suffers no loss in vitamins or another

A B C D

nutritive elements.

29. Heat exhaustion is causing by excessive loss of body fluids and body salts.

A B C D

30. Primitive humans probably did not deliberately cook food until long after they had

A B

learned to use fire fo