做了托福词汇题，词汇量增多了，语法通透了，句法熟练了，托福考试也有把握了。北京新航道托福小编和大家共享托福词汇练习，帮助大家自己的词汇量。下面，接着看今天的20道托福词汇练习题，让你每日更进一步，最终实现质的飞跃。

　　200. In effect, as molten glass cools, it progressively stiffens until rigid, but does so without setting up a network of interlocking crystals customarily associated with that process.

　　The word "customarily" is closest in meaning to which of following?

　　(A) naturally

　　(B) necessarily

　　(C) usually

　　(D) certainly

　　201. This is why glass shatters so easily when dealt a blow, why glass deteriorates over time, especially when exposed to moisture, and why glassware must be slowly reheated and uniformly cooled after manufacture to release internal stresses induced by uneven cooling.

　　The words "exposed to" in line 19 are closest in meaning to

　　(A) hardened by

　　(B) chilled with

　　(C) subjected to

　　(D) deprived of

　　202. This is why glass shatters so easily when dealt a blow, why glass deteriorates over time, especially when exposed to moisture, and why glassware must be slowly reheated and uniformly cooled after manufacture to release internal stresses induced by uneven cooling.

　　The word "induced" is closest in meaning to which of following?

　　(A) joined

　　(B) missed

　　(C) caused

　　(D) lost

　　203. The best-known specimens are the remarkable tracks discovered at Lactoli, Tanzania, by Mary Leakey.

　　The word "remarkable" is closest in meaning to which of following?

　　(A) extraordinary

　　(B) enormous

　　(C) various

　　(D) orderly

　　204. The pressures exerted along the foot, together with the length of stride, which averaged 87 centimeters, indicated that the hominids had been walking slowly. In short, all the detectable morphological features implied that the feet that left the footprints were very little different from those of contemporary humans.

　　The word "exerted" is closest in meaning to which of following?

　　(A) influenced

　　(B) applied

　　(C) returned

　　(D) lessened

　　205. The study of fossil footprints is not restricted to examples from such remote periods. Hundreds of prints are known, for example, in French caves dating from the end of the last ice age, approximately 10, 000 years ago.

　　The word "restricted" is closest in meaning to which of following?

　　(A) limited

　　(B) improved

　　(C) continued

　　(D) succeeded

　　206. The livelihood of each species in the vast and intricate assemblage of living things depends on the existence of other organisms.

　　The word "intricate" is closest in meaning to which of following?

　　(A) difficult

　　(B) widespread

　　(C) critical

　　(D) complex

　　207. A multitude of microorganisms (including viruses and bacteria) and an army of invertebrates ---

　　The expression "an army" is closest in meaning to which of following?

　　(A) an illness

　　(B) an attack

　　(C) a large number

　　(D) a distinct type

　　208. Members of the animal kingdom have developed a variety of defense mechanisms for dealing with parasites. Although these mechanisms vary considerably, all major groups of animals are capable of detecting and reacting to the presence of "foreign" cells.

　　The word "vary" is closest in meaning to which of following?

　　(A) differ

　　(B) endure

　　(C) balance

　　(D) contribute

　　209. Unimprovised, completely structured jazz does exist, but the ability of the best jazz musicians to create music of great cohesion and beauty during a performance has been a hallmark of the music and its major source of inspiration and change.

　　The word "cohesion" is closest in meaning to which of following?

　　(A) sorrow

　　(B) fame

　　(C) unity，来源：北京新航道托福考试频道

　　(D) vibration

　　210. The second distinguishing characteristic of jazz is a rhythmic drive that was initially called "hot" and later "swing."

　　The word "initially" is closest in meaning to which of following?

　　(A) at first

　　(B) shortly

　　(C) alphabetically

　　(D) in fact

　　211. In playing hot, a musician consciously departs from strict meter to create a relaxed sense of phrasing that also emphasizes the underlying rhythms.

　　The word "consciously" is closest in meaning to which of following?

　　(A) carelessly

　　(B) easily

　　(C) periodically

　　(D) purposely

　　212. Not all jazz is hot, however; many early bands played unadorned published arrangements of popular songs.

　　The word "unadorned" is closest in meaning to which of following?

　　(A) lovely

　　(B) plain

　　(C) disorganized

　　(D) inexpensive

　　213. The tight arrangement enabled the Mandans to protect themselves more easily from the attacks of others who might seek to obtain some of the food these highly capable farmers stored from one years to the next.

　　The word "enabled" is closest in meaning to which of following?

　　(A) covered

　　(B) reminded

　　(C) helped

　　(D) isolated

　　214. They had to exercise considerable skill to produce the desired results, for their northern location meant fleeting growing seasons.

　　The word "considerable" is closest in meaning to which of following?

　　(A) planning

　　(B) much

　　(C) physical

　　(D) new

　　215. This green corn was boiled, dried, and shelled, with some of the maize slated for immediate consumption and the rest stored in animal-skin bags.

　　The word "consumption" is closest in meaning to which of following?

　　(A) decay

　　(B) planting

　　(C) eating

　　(D) conversion

　　216. With appropriate banking of the extrafood, the Mandans protected themselves against the disaster of crop failure and accompanying hunger.

　　The word "disaster" is closest in meaning to which of following?

　　(A) control

　　(B) catastrophe

　　(C) avoidance

　　(D) history

　　217. Helium nuclei have also been found to be constituents of cosmic rays that fall on the earth (cosmic "rays" are not really a form of radiation; they consist of rapidly moving particles of numerous different kinds) .

　　The word "constituents" is closest in meaning to which of following?

　　(A) relatives

　　(B) causes

　　(C) components

　　(D) targets

　　218. Its relative abundance never seems to varymuch. In some places, there may be slightly more of it; in others, slightly less, but the ratio of helium to hydrogen nucleial ways remains about the same.

　　The word "vary" is closest in meaning to which of following?

　　(A) mean

　　(B) stretch

　　(C) change

　　(D) include

　　219. However, the amount of helium that could have been produced in this manner can be calculated, and it turns out to be no more than a few percent.

　　The word "calculated" is closest in meaning to which of following?

　　(A) ignored

　　(B) converted

　　(C) increased

　　(D) determined

　　220. By the time the universe was a few minutes old, helium production has effectively ceased.

　　The word "ceased" is closest in meaning to which of following?

　　(A) extended

　　(B) performed

　　(C) taken hold

　　(D) stopped

　　上面就是今天大家要做的20到托福词汇练习题，希望在做题的过程中掌握的词汇，及其用法和相关的知识。最后预祝各位考生都能够突破词汇大关，顺利拿取理想成绩。

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