单项选择题

Despite the mixture’s ______ nature, we found that by lowering its temperature in the laboratory we could dramatically reduce its tendency to vaporize.

(A) resilient
(B) volatile
(C) homogeneous
(D) insipid
(E) acerbic
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单项选择题
Measurement is, like any other human endeavor, a complex activity, subject to error, not always used ______ , and frequently misinterpreted and ______.
(A) mistakenly...derided
(B) erratically...analyzed
(C) systematically...organized
(D) innovatively...refined
(E) properly...misunderstood
单项选择题
Her novel published to universal acclaim, her literary gifts acknowledged by the chief figures of the Harlem Renaissance, her reputation as yet ______ by envious slights, Hurston clearly was at the ______ of her career.
(A) undamaged...ebb
(B) untarnished...zenith
(C) untainted...extremity
(D) blackened...mercy
(E) unmarred...brink
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