托福考试词汇精选模拟题详解5

>>托福考试词汇：托福考试词汇精选模拟题详解5

>>托福考试经典名师课程推荐

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

(A) center

(B) edge

(C) tail

(D) beginning

402. The most graphic proof that the grand spectacle of a comet develops from a relatively small and inconspicuous chunk of ice and dust was the close-up image obtained in 1986 by the European Giotto probe of the nucleus of Halley's Comet.

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

(A) mathematical

(B) popular

(C) unusual

(D) vivid

403. As a comet's orbit brings it closer to the Sun, first the coma grows, then two distinct tails usually form.

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

(A) visible

(B) gaseous

(C) separate

(D) new

404. Pheromones are substances that serve as chemical signals between members of the same species.

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

(A) improve

(B) function

(C) begin

(D) rely

405. Pheromones are the predominant medium of communication among insects (but rarely the sole method) . Some species have simple pheromone systems and produce only a few pheromones, but others produce many with various functions.

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

(A) obvious

(B) best

(C) only

(D) final

406. Some species, such as ants, seem to be very articulate creatures, but their medium of communication is difficult for humans to study and appreciate because of our own olfactory insensitivity and the technological difficulties in detecting and analyzing there pheromones.

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

(A) controlling

(B) storing

(C) questioning

(D) finding

407. Aphids, which are particularly vulnerable to predators because of their gregarious habits and sedentary nature, secrete an alarm pheromone when attacked that causes nearby aphids to respond by moving away.

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

(A) inactive

(B) inefficient

(C) unchangeable

(D) unbalanced

408. These innovations in manufacturing boosted output and living standards to an unprecedented extent;the average per capita wealth increased by nearly 1 percent per year-30 percent over the course of a generation.

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

(A) ensured

(B) raised

(C) arranged

(D) discouraged

409. Since the 1790's, North American entrepreneurs --- even without technological improvements --- had broadened the scope of the outwork system that made manufacturing more efficient by distributing materials to a succession of workers who each performed a single step of the production process.

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

(A) value

(B) popularity

(C) extent

(D) diversity

410. As early as 1782 the prolific Delaware inventor Oliver Evans had built a highly automated, laborsaving flour mill driven by water power.

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

(A) efficient

(B) productive

(C) self-employed

(D) progressive

参考答案：A D C B C D A B C B

上面的题你们都做会了吗？托福词汇的学习是需要放在文章语境中去记忆和理解的。所以练习题的作用还是很重要的，小编建议各位考生在夯实基础之后多做练习，相信最后你们的托福考试成绩一定会让自己满意的。这里的试题还是比较少的，想要更多考试练习题就来坦途网托福考试频道找找吧。