2022年考研英语一真题及解析【完整版】.pdf

2022年考研英语（一）试题及解析 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 z