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考研英语(一)完形填空专练精讲

2022-06-22

Section I Use of English

 

Directions: Read the following text. Choose the best word (s) for each numbered blank and mark A, B, C or D on the ANSWER SHEET. (10 points)

 

The idea that plants have some degree of consciousness first took root in the early 2000s; the term “plant neurobiology” was  1  around the notion that some aspects of plant behavior could be  2  to intelligence in animals.  3  plants lack brains, the firing of electrical signals in their stems and leaves nonetheless triggered responses that  4  consciousness, researchers previously reported.

But such an idea is untrue, according to a new opinion article. Plant biology is complex and fascinating, but it  5  so greatly from that of animals that so-called  6   of plants’ intelligence is inconclusive, the authors wrote.

Beginning in 2006, some scientists have  7  that plants possess neuron-like cells that interact with hormones and neurotransmitters,  8  “a plant nervous system,  9   to that in animals,” said lead study author Lincoln Taiz, “They  10  claimed that plants have ‘brain-like command centers’ at their root tips.”

This  11  makes sense if you simplify the workings of a complex brain,  12  it to an array of electrical pulses; cells in plants also communicate through electrical signals.  13  , the signaling in a plant is only  14  similar to the firing in a complex animal brain, which is more than “a mass of cells that communicate by electricity,” Taiz said.

“For consciousness to evolve, a brain with a threshold  15  of complexity and capacity is required,” he  16  . “Since plants don’t have nervous systems, the  17  that they have consciousness are effectively zero.”

And what’s so great about consciousness, anyway? Plants can’t run away from 18  , so investing energy in a body system which  19  a threat and can feel pain would be a very  20  evolutionary strategy, according to the article.

1.[A]coined          [B]discovered         [C]collected       [D]issued

2.[A]attributed       [B]directed            [C]compared      [D]confined

3.[A]unless          [B]when               [C]once           [D]though

4.[A]cope with       [B]consisted of        [C]hinted at       [D]extended in

5.[A]suffers          [B]benefits            [C]develops       [D]differs

6.[A]acceptance      [B]evidence           [C]cultivation     [D]creation

7.[A]doubted         [B]denied             [C]argued         [D]requested

8.[A]adapting        [B]forming            [C]repairing       [D]testing

9.[A]analogous       [B]essential           [C]suitable        [D]sensitive

10.[A]just            [B]ever               [C] still            [D]even

11.[A]restriction      [B]experiment        [C]perspective     [D]demand

12.[A]attaching       [B]reducing          [C]returning       [D]exposing

13.[A]However       [B]Moreover         [C]Therefore      [D]Otherwise

14.[A]temporarily    [B]literally           [C]superficially    [D]imaginarily

15.[A]list             [B]level             [C]label            [D]local

16.[A]recalled        [B]agreed            [C]questioned      [D]added

17.[A]chances        [B]risks              [C]excuses         [D]assumptions

18.[A] danger        [B]failure             [C]warning        [D]control

19.[A]represents      [B]includes           [C]reveals         [D]recognizes

20.[A]humble         [B]poor              [C]practical        [D]easy

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