单项选择题

Though a leading authority on Romantic literature, the chairperson is a speaker whose lectures on even the most exciting literary anecdotes of that time span cause students to yawn and fidget.

(A) grandiloquent
(B) self-assured
(C) eminent
(D) conscientious
(E) lackluster
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单项选择题
As the master of ceremonies, that memorable evening, was a noted______, the occasion seemed to promise the greatest facetiousness and wit.
(A) valetudinarian
(B) wag
(C) vocalist
(D) bard
(E) bore
单项选择题
According to the passage, which of the following statements best describes the relationship between secondary atmospheric circulations and jet streams
(A) Jet streams and baroclinic waves tend to interact most intensely with one another in the winter, then act independently in the summer.
(B) Jet streams and baroclinic waves tend to exist at various points in the atmosphere in inversely proportional strength.
(C) Jet streams and baroclinic waves may behave differently, but they issue from a common source and augment one another.
(D) Jet streams tend to distribute kinetic energy in the atmosphere, and baroclinic waves relay this energy back to the jet stream.
(E) Jet streams tend to be more affected by the presence of landmasses than do haroclinic waves.
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