对于托福考试中单词题的解题方法，同学们还是多练为主，本系列汇总了托福词汇题精选440题，本期带来的是431-440，相信大家通过勤加练习，多看多记，一定可以攻克托福词汇题的。
431. Glass fibers were little more than a novelty until the 1930's, when their thermal and electrical insulating properties were appreciated and methods for producing continuous filaments were developed.
The word "appreciated" is closest in meaning to which of following?
(A) experienced
(B) recognized
(C) explored
(D) increased
432. The scarce fossils of the Proterozoic, mostly single-celled bacteria, provide little evidence in this regard. However, the rocks themselves do include the earliest evidence for glaciation, probably a global ice age.
The word "scarce" is closest in meaning to which of following?
(A) ancient
(B) tiny
(C) available
(D) rare
433. In 2.3-billion-year-old rocks in Canada near Lake Huron (dating from the early part of the Proterozoic age), there are thin laminae of fine-grained sediments that resemble varves, the annual layers of sediment deposited in glacial lakes.
The word "resemble" is closest in meaning to which of following?
(A) result from
(B) penetrate
(C) look like
(D) replace
434. Watching the behaviors diverse animal species in their natural habitats, Lorenz, and Tinbergen observed behavior patterns that promote survival.
The word "diverse" is closest in meaning to which of following?
(A) small
(B) varied
(C) wild
(D) particular
435. The most well-known of these is imprinting, the early following behavior of certain baby birds that ensures that the young will stay close to their mother and be fed and protected from danger.
The word "ensures" is closest in meaning to which of following?
(A) guarantees
(B) proves
(C) teaches
(D) assumes
436. It refers to a limited time span during which the child is biologically prepared to acquire certain adaptive behaviors but needs the support of suitably stimulating environment.
The word "suitably" is closest in meaning to which of following?
(A) willingly
(B) moderately
(C) appropriately
(D) emotionally
437. The development of attachment in human infants is a lengthy process involving changes in psychological structures that lead to a deep affectional tie between parent and baby.
The phrase "affectional tie" is closest in meaning to which of following?
(A) cognitive development
(B) emotional attachment
(C) psychological need
(D) behavioral change
438. Locke strongly suggested that individuals, while accepting their Americanism, take pride in their African ancestral arts and urged artists to look to Africa for substance and inspiration.
The word "urged" is closest in meaning to which of following?
(A) prepared
(B) defined
(C) permitted
(D) encouraged
439. From this unity created by the convergence of artists from various social and geographical backgrounds came a new spirit, which, particularly in densely populated Harlem, was to result in greater group awareness and self-determination.
The word "convergence" is closest in meaning to which of following?
(A) gathering
(B) promotion
(C) expression
(D) influence
440. African American graphic artists took their place beside the poets and writers of the Harlem Renaissance and carried on efforts to increase and promote the visual arts.
The phrase "carried on" is closest in meaning to which of following?
(A) continued
(B) praised
(C) transformed
(D) connected
参考答案：B D C B A C B D A A
以上就是前程百利为大家整理的托福词汇题精选440题(44)，到这里整个系列就全部结束了，希望大家在平常复习中多进行参考训练以提高自己的考试水平。前程百利祝大家都能取得理想的考试成绩。
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