reading passage.
题目原文：
Hail—pieces of ice that form and fall from clouds instead of snow or rain—has always been a problem for farmers in some areas of the United States. Hail pellets can fall with great force and destroy crops in the field. Over the last few decades, a method of reducing hail, called "cloud seeding," has been tried. In cloud seeding, the chemical silver iodide is sprayed on storm clouds from an airplane. This makes the clouds produce harmless rain or snow instead of hail. Several pieces of evidence suggest that cloud seeding has been effective in protecting crops from hail. Laboratory experiments Experiments in the laboratory support the idea that cloud seeding is effective. Hail usually forms water vapor that is close to the freezing point However, when experimenters added silver iodide to cold water vapor in the laboratory, they often observed light snow forming instead of hail pellets. Evidence from Asia There is evidence about the effectiveness of cloud seeding from several countries around the world. In some Asian countries, for example, cloud seeding has been successfully used to control precipitation in urban areas. These positive results suggest that cloud seeding should also be effective in protecting fields and farms in the United States. Local studies A few local studies also support the value of cloud seeding. One study conducted in a farming region in the central United States, for example, directly monitored crop damage due to hail. The study found that in an area where cloud seeding was used there was reduced hail damage compared to previous years.
The author discussed that although hail makes crops suffer a lot, there has always been a method called cloud seeding which can protect crops from this disaster. He listed three facts supporting this approach. However, the speaker holds a contradictory view that all these three ways are not reliable. First, the writer proposes that laboratory experiments has already proved that cloud seeding is effective in eliminating hail. But the professor points out that although the hail can be turned into rain and snow in experimental movement, but it is also possible that hail, snow and rain can be all prevented by cloud seeding. Consequently, it will cause drought. Crops will still be damaged as a result of lack of water. The writer’s first argument is refuted. Second, the passage indicates that cloud seeding has an Asia evidence. To render this disproof, the lecturer reveals that this successful application in Asia probably will not get a similar outcome in America. High air pollution offers favorable conditions for cloud seeding process because those polluted air can interact with cloud and seeding chemicals. So this method which can be used in cities area may not be effective in unpolluted farming area. The second idea in the passage is also retorted. Third, the essay says that local studies in central United States also attain a satisfying result. Nevertheless, the speaker rebuts this idea. He thinks it unconvincing because hail damage in whole America not only decreases just in central of America, but also in the east, south and north part of country. So it is hard to say cloud seeding is the exact factor causes all those good things. Natural variation and local weather can also contribute to the elimination of hail disaster. This overturns the writer’s concept.
| Post date | Users | Rates | Link to Content |
|---|---|---|---|
| 2019-04-08 | toefl 2019 | 80 | view |
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Transition Words or Phrases used:
also, but, consequently, first, however, may, nevertheless, second, so, still, third, as a result
Attributes: Values AverageValues Percentages(Values/AverageValues)% => Comments
Performance on Part of Speech:
To be verbs : 13.0 10.4613686534 124% => OK
Auxiliary verbs: 10.0 5.04856512141 198% => OK
Conjunction : 8.0 7.30242825607 110% => OK
Relative clauses : 11.0 12.0772626932 91% => OK
Pronoun: 25.0 22.412803532 112% => OK
Preposition: 24.0 30.3222958057 79% => OK
Nominalization: 7.0 5.01324503311 140% => OK
Performance on vocabulary words:
No of characters: 1505.0 1373.03311258 110% => OK
No of words: 294.0 270.72406181 109% => OK
Chars per words: 5.11904761905 5.08290768461 101% => OK
Fourth root words length: 4.14082457966 4.04702891845 102% => OK
Word Length SD: 2.65142326901 2.5805825403 103% => OK
Unique words: 173.0 145.348785872 119% => OK
Unique words percentage: 0.58843537415 0.540411800872 109% => OK
syllable_count: 459.9 419.366225166 110% => OK
avg_syllables_per_word: 1.6 1.55342163355 103% => OK
A sentence (or a clause, phrase) starts by:
Pronoun: 4.0 3.25607064018 123% => OK
Article: 9.0 8.23620309051 109% => OK
Subordination: 0.0 1.25165562914 0% => More adverbial clause wanted.
Conjunction: 3.0 1.51434878587 198% => OK
Preposition: 1.0 2.5761589404 39% => More preposition wanted as sentence beginning.
Performance on sentences:
How many sentences: 19.0 13.0662251656 145% => OK
Sentence length: 15.0 21.2450331126 71% => The Avg. Sentence Length is relatively short.
Sentence length SD: 47.8726959117 49.2860985944 97% => OK
Chars per sentence: 79.2105263158 110.228320801 72% => OK
Words per sentence: 15.4736842105 21.698381199 71% => OK
Discourse Markers: 5.10526315789 7.06452816374 72% => OK
Paragraphs: 1.0 4.09492273731 24% => More paragraphs wanted.
Language errors: 0.0 4.19205298013 0% => OK
Sentences with positive sentiment : 7.0 4.33554083885 161% => OK
Sentences with negative sentiment : 7.0 4.45695364238 157% => OK
Sentences with neutral sentiment: 5.0 4.27373068433 117% => OK
What are sentences with positive/Negative/neutral sentiment?
Coherence and Cohesion:
Essay topic to essay body coherence: 0.184206735619 0.272083759551 68% => OK
Sentence topic coherence: 0.0456600427102 0.0996497079465 46% => OK
Sentence topic coherence SD: 0.0601389345118 0.0662205650399 91% => OK
Paragraph topic coherence: 0.184206735619 0.162205337803 114% => OK
Paragraph topic coherence SD: 0.0 0.0443174109184 0% => Paragraphs are similar to each other. Some content may get duplicated or it is not exactly right on the topic.
Essay readability:
automated_readability_index: 10.4 13.3589403974 78% => Automated_readability_index is low.
flesch_reading_ease: 56.25 53.8541721854 104% => OK
smog_index: 3.1 5.55761589404 56% => Smog_index is low.
flesch_kincaid_grade: 9.1 11.0289183223 83% => OK
coleman_liau_index: 12.12 12.2367328918 99% => OK
dale_chall_readability_score: 8.84 8.42419426049 105% => OK
difficult_words: 83.0 63.6247240618 130% => OK
linsear_write_formula: 11.0 10.7273730684 103% => OK
gunning_fog: 8.0 10.498013245 76% => OK
text_standard: 11.0 11.2008830022 98% => OK
What are above readability scores?
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Minimum four paragraphs wanted. The correct pattern:
para 1: introduction
para 2: doubt 1
para 3: doubt 2
para 4: doubt 3
Less contents wanted from the reading passages(25%), more content wanted from the lecture (75%).
Don't need a conclusion paragraph.
Read sample essays from ETS:
http://www.testbig.com/users/toeflwritingmaster
Rates: 75.0 out of 100
Scores by essay e-grader: 22.5 Out of 30
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Note: the e-grader does NOT examine the meaning of words and ideas. VIP users will receive further evaluations by advanced module of e-grader and human graders.