[单项选择]The suggested causes of a given phenomenon cannot always be independently observed, and so it is hard to ______ the possibility of there being explanations alternative to the one proposed.
A. account for
B. rule out
C. guard against
D. do with

[单项选择]The suggested causes of a given phenomenon cannot always be independently observed, and so it is hard to ______ the possibility of there being explanations alternative to the one proposed.
A. account for
B. rule out
C. guard against
D. do with

[单项选择]He suggested ______ a lecture given by Professor White on English language learning.
A. me to attend
B. my attending
C. my attention
D. me attending

[单项选择]Solar energy causes
A. less pollution than oil
B. the same pollution as oil
C. more pollution than oil
D. financial problem

[单项选择]Causes of fashions are
A. uniform.
B. varied.
C. unknown.
D. inexplicable.

[单项选择]The Americanization phenomenon is more possible to be the result of______.
A. the influence of Americanization on the world
B. the influence of the West on the East
C. the globalization in the world
D. American products worldwide

[单项选择]The Renaissance was a European phenomenon originated in ______.
A. France
B. Britain
C. Italy
D. Spain

[单项选择]The phenomenon that words having different meanings have the same form is called（）
A. hyponymy.
B. synonymy.
C. polysemy.
D. homonymy.

[单项选择]Polarized light is a probably phenomenon characterized by its ______.
A. rotational symmetry.
B. charged particles.
C. radiation flashes.
D. frequent twists.

[单项选择]The language phenomenon that words having different meanings have the same form is called ______.
A. homonymy
B. hyponymy
C. polysemy
D. antonymy

[单项选择]Democratic Congressmen suggested that the government should ______.
A. be enthusiastic in providing a drug benefit to the people
B. Oppose the new legislation with thundering protests
C. give more money, so to speak, to medicine makers and retailers
D. provide financial assistance to people wanting to buy life insurance

[单项选择]A possible disadvantage of telecommuting suggested in the passage is that_________.
A. electrical malfunctions can destroy a project
B. the worker often does not have all the needed resources at home
C. telecommuting workers cannot understand the boundaries of work and play
D. computer technology is not advanced enough to accommodate the needs of every situation

[单项选择]The "apparently contradictory phenomenon" is that _____.

[单项选择]If the phenomenon "extinction risk increased significantly with decreasing heterozygosity" (lines 9-10) agrees with the proposed effect on extinction, the passage assumes
A. (A) heterozygosity is an indicator of increasing inbreeding depression in assimilated metapopulations
B. (B) heterozygosity is unrelated to the degree of inbreeding depression in assimilated metapopulations
C. (C) heterozygosity is an indicator of decreasing inbreeding depression in isolated metapopulations
D. (D) heterozygosity is an indicator of increasing inbreeding depression in isolated metapopulations
E. (E) heterozygosity is an indicator of decreasing inbreeding depression in assimilated metapopulations

[单项选择]What is the phenomenon called where different wavelengths of light travel at different speeds?（）
A. OSNR
B. dispersion
C. light skew
D. attenuation

[单项选择]Opiate withdrawal causes severe physical discomfort and can be life-threatening. To minimize these effects, opiate users are commonly detoxified with which drug
A. Barbiturates.
B. Amphetamines.
C. Methadone.
D. Benzodiazepines.

[单项选择]According to the passage, the first phenomenon to contribute to 'the formation of the Grand Canyon was ______.

[单项选择]The mankind should face the phenomenon that the world has become a world of cities with ______.
A. a lot of difficulties
B. efforts to improve housing condition
C. pressure of the basic needs
D. new models and a great deal of transformation of ideas and methods

[单项选择]Which of the following is NOT a phenomenon mentioned in the passage
A. The body may still be alive after the heart and the brain have stopped working.
B. The heart may keep beating after the brain has died.
C. The brain may still be active after the heart has stopped beating.
D. The lung may keep breathing after the brain has died.