托福TOEFL词汇题精选单词题400题（17）

　　331. Air currents move and lift droplets so that the net downward displacement is zero, even though the droplets are in constant motion.
　　The word "motion" is closest in meaning to which of following?
　　(A) wind
　　(B) change
　　(C) movement
　　(D) humidity
　　332. To the casual observer, dust seems to act in a totally random fashion, moving about chaotically without fixed direction.
　　The word "random" is closest in meaning to which of following?
　　(A) uNPRedictable
　　(B) perplexing
　　(C) independent
　　(D) abnormal
　　333. During the 1920's she was editor of The Dial, an important literary magazine of the period.
　　The word "period" is closest in meaning to which of following?
　　(A) movement
　　(B) school
　　(C) region
　　(D) time
　　succeeding generations of poets and readers.
　　The word "succeeding" is closest in meaning to which of following?
　　(A) inheriting
　　(B) prospering
　　(C) diverse
　　(D) later
　　334. The Southwest has always been a dry country, where water is scarce. The Hopi and Zuni brought water from streams to their fields and gardens through irrigation ditches.
　　The word "scarce" is closest in meaning to which of following?
　　(A) limited
　　(B) hidden
　　(C) pure
　　(D) necessary
　　335. Like tree roots breaking up a sidewalk, the growing crystals exert pressure on the rock and eventually pry the rock apart along planes of weakness, such as banding in metamorphic rocks, bedding in sedimentary rocks, or preexisting or incipient fractions, and along boundaries between individual mineral crystals or grains.
　　The word "exert" is closest in meaning to which of following?
　　(A) put
　　(B) reduce
　　(C) replace
　　(D) control
　　336. A rock durable enough to have withstood natural conditions for a very long time in other areas could probably be shattered into small pieces by salt weathering within a few generations.
　　The word "durable" is closest in meaning to which of following?
　　(A) large
　　(B) strong
　　(C) flexible
　　(D) pressured
　　The word "shattered" is closest in meaning to which of following?
　　(A) arranged
　　(B) dissolved
　　(C) broken apart
　　(D) gathered together
　　337. The dominant salt in Death Valley is halite, or sodium chloride, but other salts, mostly carbonates and sulfates, also cause prying and wedging, as does ordinary ice.
　　The word "dominant" is closest in meaning to which of following?
　　(A) most recent
　　(B) most common
　　(C) least available
　　(D) least damaging
　　338. Overland transport in the United States was still extremely primitive in 1790. Roads were few and short, usually extending from inland communities to the nearest river town or seaport.
　　The word "primitive" is closest in meaning to which of following?
　　(A) unsafe
　　(B) unknown
　　(C) inexpensive
　　(D) undeveloped
　　339. Nearly all interstate commerce was carried out by sailing ships that served the bays and harbors of the seaboard. Yet, in 1790 the nation was on the threshold of a new era of road development.
　　The phrase "on the threshold of" in line 4 and 5 is closest in meaning to which of following?
　　(A) in need of
　　(B) in place of
　　(C) at the start of
　　(D) with the purpose of
　　340. The company built a gravel road within two years, and the success of the Lancaster Pike encouraged imitation. Northern states generally relied on private companies to build their toll roads, but Virginia constructed a network at public expense.
　　The word "imitation" is closest in meaning to which of following?
　　(A) investment
　　(B) suggestion
　　(C) increasing
　　(D) copying