[单项选择]The author of the passage mentions the "'professional primitive' role" (line 15) assumed by foragers in their relationships with agriculturalists primarily in order to
A. (A) inform the reader of the potential cause of certain changes in rain forest composition
B. (B) suggest that foragers may have developed agricultural practices, then abandoned them in order to focus on more specialized food-gathering practices
C. (C) explain why certain food gathering practices may be less efficient sources of carbohydrates than others
D. (D) introduce new evidence for the interdependence between agriculturalists and foragers in the rain forest economy
E. (E) suggest that certain rain forest food products are healthier than others, though more difficult to obtain through foraging

[单项选择]The author of the passage mentions the " 'professional primitive' role" (line 15) assumed by foragers in their relationships with agriculturalists primarily in order to
A. (A) inform the reader of the potential cause of certain changes in rain forest composition
B. (B) suggest that foragers may have developed agricultural practices, then abandoned them in order to focus on more specialized food-gathering practices
C. (C) explain why certain food gathering practices may be less efficient sources of carbohydrates than others
D. (D) introduce new evidence for the interdependence between agriculturalists and foragers in the rain forest economy
E. (E) suggest that certain rain forest food products are healthier than others, though more difficult to obtain through foraging

[单项选择]The author of the passage mentions which of the following as posing an alternative to the Headland Hypothesis

[单项选择]The author of this passage mentions "a road" in his introduction of the IP phones ______.
A. to make it easier for the reader to understand the new technology
B. to imply that the phone calls are usually made on the road
C. because people usually would share a road with each other
D. because the road you are walking on is usually empty

[单项选择]In this passage, when the author mentions "hundreds of deaths", he refers to______.


A. the deaths of hundreds of ova
B. the deaths caused by abortion
C. the natural deaths of old people
D. the deaths of hundred of boaies

[单项选择]The passage mentions that the tropics differ from the Earth's polar regions in which of the following ways
A. ( The height of cloud formation in the atmosphere
B. ( The amount of heat they receive from the Sun
C. ( The strength of their largescale winds
D. ( The strength of their oceanic currents

[单项选择]The passage mentions all of the following statements except that ______.

[单项选择]The passage mentions that many people believe that if you don't eat breakfast, you will______.
A. not lose weight
B. be healthier
C. gain weight
D. lose weight

[单项选择]The passage mentions all of the following factors for the existence of life EXCEPT
A. the right amount of atmosphere.
B. a steady supply of water.
C. steady heat and light.
D. the right distance from the sun.

[单项选择]In this passage the author apparently intends to


A. write a fictionalized account of evolution.
B. be scientifically precise.
C. raise philosophical issues.
D. convince readers that war is inevitable.

[单项选择]The passage mentions some of VSPs structures EXCEPT ______.
A. an engines with two forward gears
B. sturdy and adjustable seats
C. rear windshield wipers
D. a standard heating system

[单项选择]The passage mentions all of the following aspects of plankton EXCEPT
A. ( the length of their lives
B. ( the level of the ocean at which they are found
C. ( their movement
D. ( their size

[单项选择]The passage mentions that tulips were first found in which of the following regions
A. ( Central Asia
B. ( Western Europe
C. ( India
D. ( North America

[单项选择]In the following passage the author intends to
A. explain how the Gulf Stream is formed.
B. compare global warming with global cooling.
C. explain the composition of the sea currents.
D. deliver a warning of a coming ice age.

[单项选择]In the passage the author suggests that the counterculture__________.


A. destroyed the United States
B. changed some American values
C. was not important in the United States
D. brought people more leisure time with their families