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　　In the last two hundreds years, the practice of archaeology has changed greatly, from digging up ancient artifacts for use by wealthy individuals as art objects to analyzing the detritus of everyday life in the laboratory, and thus from ______ to data collection.

　　A：supposition

　　B：theorizing

　　C： fact-finding

　　D： treasure hunting

　　E： scientific discovery

　　答案：D

　　The identity of hominid remains found in a cave in the Altai Mountains was ______ until Paabo and his colleagues ended the speculation by showing that DNA sequences indicated the bones belonged to Neanderthals.

　　A：extraneous

　　B：conjectural

　　C： improbable

　　D：demonstrable

　　E：consistent

　　答案：B

　　Though humanitarian emergencies are frequent features of television news, such exposure seldom_______the public, which rather seems resigned to a sense of impotency.

　　A：paralyzes

　　B：demoralizes

　　C：assuages

　　D：galvanizes

　　E：exasperates

　　答案：D

　　The science of astronomy was begun by amateurs and today remains dependent on their contributions, which are incisive by virtue of being_______by the a priori assumptions that often vitiate the work of professional research scientists.

　　A：characterized

　　B：unencumbered

　　C：supported

　　D：contradicted

　　E：inspired

　　答案：B

　　History teaches us that science is not_______enterprise, indeed, it is quite the opposite, amotley assortment of tools designed to safeguard researchers against their own biases.

　　A：an opportunistic

　　B：an anomalous

　　C：a haphazard

　　D：a collective

　　E：a monolithic

　　答案：E

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