高考生物基础必刷题

【英语】高考必刷题英语动词题

一、单项选择动词

1．To get promoted, I must _____ my colleagues, who are committed to their jobs.

A．take after B．take to C．take in D．take on

【答案】A

【解析】

试题分析：考查动词短语辨析。短语take after长得像，性格类似于，效仿；take to喜欢上，沉溺于；take in吸收，理解，欺骗，收养；take on雇佣，呈现；句意：为了被提拔，我要消防我的同事们，他们工作非常努力。根据句意可知take after意为“效仿”，符合上下文含义。

考点：考查动词短语辨析

2．Clinical evidence began to________， suggesting that the new drugs had a wider range of

useful activities than had been predicted from experiments in animals.

A．operate B．strengthen

C．approve D．accumulate

【答案】D

【解析】

【分析】【详解】

考查动词辨析。句意：临床证据开始积累，表明这种新药比在动物身上的实验所预计的有更广范围的使用。A. operate 操作，运转；B. strengthen加强；C. approve批准，赞成；D.

accumulate积累。根据句意选D。

3．Pupils who pass the test will be _____ to the next grade.

A．promoted B．progressed

C．proceeded D．proposed

【答案】A

【解析】

【详解】

考查动词词义辨析。句意：通过考试的学生将升入下一年级。A. promoted 提升 B.

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“6+1”天天练(15)

一、选择题

1.(2019广东深圳调研)自由基学说认为,自由基能攻击和破坏细胞内多种执行正常功能的生物分子,最终致使细胞衰老。下列有关自由基的说法错误的是( )

A.攻击蛋白质降低某些酶的活性

B.攻击DNA可能引发基因突变

C.攻击磷脂直接导致中心体损伤

D.攻击生物膜引发新的自由基产生

答案 C 自由基是正常代谢的中间产物,其反应能力很强,可使细胞中的多种物质发生氧化。自由基产生后,攻击和破坏细胞内各种执行正常功能的生物分子。最为严重的是攻击生物膜的组成成分磷脂分子,引发雪崩式的反应,对生物膜的损伤比较大。此外自由基还会攻击DNA,可能引发基因突变;攻击蛋白质,使蛋白质活性下降,致使细胞衰老。因此自由基产生后会攻击蛋白质,若该蛋白质属于酶,其活性则会降低,A正确;自由基攻击DNA,进而可能引发基因突变,B正确;自由基若攻击生物膜的组成成分磷脂分子,会产生更多的自由基,这些新的自由基又会攻击其他磷脂分子,进而引发雪崩式的反应,对生物膜损伤极大,但自由基并未直接导致中心体损伤,中心体无膜,不含磷脂,C错误,D正确。

2.(2019河北省级示范性高中联考)某些蛋白酶在生产和使用前需要测定酶活性。如图表示科研人员选用酪蛋白对多种蛋白酶的活性进行测定的实验结果(注:实验在30 ℃、pH=9.0的条件下进行),下列分析错误的是( )

A.在上述实验条件下,蛋白酶K和α-胰凝乳蛋白酶的活性最高

B.在实验过程中,部分菠萝蛋白酶和胰蛋白酶可能失活

C.这几种蛋白酶均能分解酪蛋白,说明这些酶不具有专一性

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D.可用盐析的方法从各种蛋白酶的提取液中沉淀出蛋白酶

答案 C 在题中所给实验条件下,蛋白酶K和α-胰凝乳蛋白酶的活性最高,A正确;该实验是在30 ℃、pH=9.0的条件下进行的,菠萝蛋白酶和胰蛋白酶在实验中的活性较低,部分酶可能失活,B正确;酶的专一性是指一种酶只能催化一种或一类化学反应,该实验中虽然多种蛋白酶都能分解酪蛋白,但不能得出酶不具有专一性的结论,C错误;题中几种酶的化学本质都是蛋白质,能溶于盐溶液,可用盐析的方法把这几种蛋白酶从各自的提取液中沉淀出来,D正确。

（英语）高考必刷题英语动词题

一、单项选择动词

1．Chris, please ________ a meeting with Mr. Du for me this evening who came back from

Canada yesterday.

A．manage B．organize

C．plan D．arrange

【答案】D

【解析】

试题分析：考查动词辨析。A管理，设法做成；B组织；C计划；D安排。arrange sth for sb替某人安排......。句意：克瑞斯，今晚请帮我安排一个与昨天从加拿大回来的杜先生的会议。故选D。

考点：考查动词辨析

2．Many of us have concerns about the challenges facing future generations as our global

population _______ and the earth’s natural resources decrease.

A．extends B．declines

C．swells D．varies

【答案】C

【解析】

【详解】

考查动词词义辨析。A. extends扩大；B. declines下降；C. swells膨胀；D. varies改变。句意：随着全球人口的膨胀和自然资源的减少，我们许多人都对后代面临的挑战感到担忧。根据“the earth’s natural resources decrease”判断此处表示“人口的膨胀”，故C项正确。

3．Although the long sentence and difficult structures in this novel have been ______, it still

keeps much of the charm and favor of the original.

A．occupied B．polished

高考短文改错必刷题

高考短文改错必刷题

Last Saturday, we organize a trip to the countryside. The countryside has taken on a new look everywhere.

All around us, the hills are covering with green trees and colorful flower. Rivers are clean with bridges over

them, that makes a beautiful picture. Farmers are living in nice houses which are equipped fine furniture.

Nowadays the farmers there.is caring more about our life quality. With their life greatly improve, they have

more time for a leisure. That may be why people look more energetic and young for their age.

A man was driving on the road. Suddenly his cars stopped. He got out of the car, try to find out the trouble.

“It’s the motor,” said the voice behind him. He was surprising and turned around. But he saw only an old horse.

“Did you say anything?” he asked. “I said you should check yours motor,” the horse replied. The man rushed to