【考研英语】2021年6月北京中国石油大学研究生招生考试英语练习题100道（附答案
解析）
第1题【单选题】
围绕中心意思写作文
I _______ four universities and was accepted by all of them.
A、applied to
B、applied from
C、applied in
D、applied off
【正确答案】A
梦见自己脱发【答案解析】题目意思：我申请了四所大学，并都被他们录取了。apply to 向…正式申请；向…要求，答案选A。
恐怖大全
第2题Directions:You are going to read a list of headings and a text about world’s first DNA computers. Choo the most suitable heading from the list A-F for each numbered paragraph (1-5). The first and last paragraphs of the text are not numbered. There is one extra heading which you do not need to u. Mark your answers on ANSWER SHEET 1. （10 points）[A]The ability of DNA to store information[B]Examples for the future u of DNA computers[C]The advantage of DNA
computers[D]The rearch of DNA computers is at the beginning stage[E]The working principle of the microscopic computers[F]The evaluation made by the rearching team on DNA computersIsraeli scientists have built a DNA computer so tiny that a trillion of them could fit in a test tube and perform a billion operations per cond with 99.8 percent accuracy.1) _______________It is the first programmable autonomous computing machine in which the input, output, software and hardware are all made of biomolecules. Instead of using fires and formulas to solve a problem, the microscopic computer’s input, output and software are made up of DNA molecules—which store and process encoded information in living organisms.2) _______________Scientists e such DNA computers as future competitors to their more conventional cousins becau miniaturization is reaching its limits and DNA has the potential to be much faster than conventional computers. “We have built a nanoscale computer made of biomolecules that is so small you cannot run them one at
a time. When a trillion computers run together they are capable of performing a billion operations, "said Ehud Shapiro, Professor of the Weitzman Institute in Israel.3) _______________Although too simple to have any immediate applications it could form the basis of a DNA computer in the future that could potentially operate within human cells and act as a monitoring device to detect potentially, dia-causing changes and synthesize
drugs to fix them. The model could also form the basis of computers that could be ud to screen DNA libraries in parallel without quencing each molecule, which could speed up the acquisition of knowledge about DNA.4) _______________DNA can hold more information in a cubic centimeter than a trillion CDs. The double helix molecule that contains human genes stores data on four chemical bas—known by the letters A, T, O and G—giving it massive memory capability that scientists are only just beginning to tap into."The living cell contains incredible molecular machines that manipulate information-encoding molecules such as DNA and RNA in ways that are fundamentally very similar to computation,” said Shapiro, the head of the rearch team that developed the DNA computer. "Since we don’t know how to effectively modify the machines or create new ones just yet, the trick is to find naturally existing machines that, when combined, can be steered to actually compute, "he added.5) _______________Writing in the science journal Nature, S
hapiro and his team describe their DNA computer the automaton which can answer certain yes or no questions. Data is reprented by pairs of molecules on a strand of DNA and two naturally occurring enzymes act as the hardware to read, copy and manipulate the code. When it is all mixed together in the test tube, the software and hardware operate on the input molecule to create the output.DNA computing is a very young branch of science that started less than a
decade ago, when Leonard Adleman of the University of Southern California pioneered the field by using DNA in a test tube to solve a mathematical problem.Scientists around the globe are now trying to marry computer technology and biology by using nature’s own design to process information.
【正确答案】ECBAF
不忘初心的例子>微信滴滴打车【答案解析】1)【答案】E【解析】本段位于整篇文章第二段，在第一段概括介绍之后，这一段具体说明此类计算机的工作原理，故选E。2)【答案】C【解析】本段第一句话介绍说DNA 计算机具有较传统计算机运行速度更快的优势，之后通过以色列教授的话具体肯定，故整段是围绕DNA计算机的优势展开，选C。3)【答案】B【解析】本段主要是对DNA计算机在未来应用的展望，包括可以被植入人体细胞内，作为监控装置检测出潜在的致病变化，并合成药物“修理”致病变化，还可以并行方式而非按顺序筛选DNA资料库，这样要可以加快人们对DNA知识的获取，故选B。4)【答案】A【解析】本段
第一句话说明每立方厘米DNA上可容纳的信息要比一万亿张光盘存储的容量还要多。由此可推断本段主要在介绍DNA存储信息的巨大能力，故选A。5)【答案】F【解析】此段第一句话引用《自然》科学杂志刊登的一篇文章，说明在沙皮罗和研究小组成员的眼中，DNA计算机是一种何种性质的装置，故选F。
第3题【单选题】
背怎么写“Who should go to e Li Ying He is ill today.”“I suggest Wang Hong ________.”
A、goes
B、would go
C、go
D、went
【正确答案】C
【答案解析】suggest在本句中意思是：建议。此时suggest 后面的从句需要用虚拟语气，谓语动词用should＋动词原形的形式，should可以省略。所以答案是C。摄影的艺术
第4题【单选题】
The group does not [advocate] the u of violence.
A、support
B、matter
C、suit
D、reach
【正确答案】A
【答案解析】[advocate] 提倡，主张，拥护；support 支持，支撑，支援。小学生必读书目
