相关试题
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锁存器、三态缓冲寄存器等简单芯片中没有命令寄存和状态寄存等功能。
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EPROM中存放的信息在计算机执行程序时只读，且断电后仍能保持原有的信息。
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8031的CPU是由RAM和EPROM所组成。
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内部RAM的位寻址区，只能供位寻址使用，而不能供字节寻址使用。
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MCS-51系列单片机的内部特殊功能寄存器的数量是相同的。
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ADC0809是12位的逐次逼近式数模转换芯片。
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低优先级的中断请求不能中断高优先级的中断请求，但是高优先级中断请求能中断低优先级中断请求。
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各中断源发出的中断请求信号，都会标记在MCS-51系统的IP寄存器中。
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定时/计数器可由TM0D设定四种工作方式。
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按照串行数据的时钟控制方式，串行通信可分为异步通信和同步通信两类。
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我们所说的计算机实质上是计算机的硬件系统与软件系统的总称。
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MCS-51上电复位时，SBUF=00H。
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8155的复位引脚可与89C51的复位引脚直接相连。
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要MCS-51系统中，一个机器周期等于1.5μs。
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若不使用MCS-51片内存器引脚EA必须接地.
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十进制数-29的8位补码表示为.11100010
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二进制数11000011的十进制有符号数是195
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单片机中的程序计数器PC是用来存放指令的
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80C51单片机要使用片内存储器，EA引脚必须接+5V (+12V)
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80C51单片机的定时/计数器在工作方式1时的最大计数值为M=213=8192
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80C51用串口工作方式0时，数据从RXD串行输入或输出，同步信号从TXD输出。
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城市是伴随着私有制和阶级分化，在___时期出现的。
A. 原始社会
B. 原始社会向奴隶社会过渡
C. 奴隶社会
D. 奴隶社会向封建社会过渡
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《周礼·考工记》体现___思想，《管子·度地篇》体现____思想。
A. 皇权至上；自然至上
B. 自然至上；皇权至上
C. 皇权至上；皇权至上 Ｄ、自然至上；自然至上
【单选题】
下列___种情况会导致就业岗位减少和结构性失业。
A. 工业化
B. 后工业化
C. 信息化
D. 逆工业化
【单选题】
美国人___设计的纽约的中央公园是城市美化运动的产物。
A. 伯汉姆
B. 奥姆斯特德
C. 西谛
D. 凯伯里
【单选题】
在城市用地的适宜性区划中，一类用地指___。
A. 用地的工程地质等自然环境、条件比较优越，能适应各项城市设施的建设需要，一般不需要或只需要稍加采取工程措施，即可用于建设的用地
B. 需要采取一定的工程措施，改善条件后方能修建的用地
C. 需要采取特殊工程措施后才能用作建设的用地
D. 不适于修建的用地
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城市工业用地的代码是____，居住用地代码是___。
A. H；H
B. J；R
C. M；R
D. Z；Y
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城市化过程的三个阶段即初期阶段、中期阶段、后期阶段，对应的城市化水平分别为___
A. 20% 35% 50%
B. 30% 30~70% 70~90%
C. 25% 40% 60%
D. 40% 40~80% 80~95%
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城市总体规划的期限一般为___年，近期建设规划期限一般为___年。
A. 50； 20
B. 30； 20
C. 20； 5
D. 10； 3
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根据我国的城乡规划法，城市规划的编制和审批实行___，由____负责组织编制城市规划。
A. 统一体制；国务院
B. 分级编制；各级城市规划管理部门
C. 分级编制；各级城市的人民政府
D. 统一体制；建设部
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城市总体规划的用地分类___
A. 以大类为主，中类为辅
B. 以中类为主，小类为辅
C. 分至中类
D. 分至小类
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在城市总体规划中，小学校用地属于城市用地分类中的___。
A. 居住用地
B. 公共设施用地
C. 市政公用设施用地
D. 绿地
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___不是用地指标，但它是研究绿量和衡量绿化环境效能的重要指标，通常可以通过对航天或航空遥感影像数据分析，并辅以地面补充调查获得。
A. 人均绿地占有率
B. 绿地率
C. 绿化覆盖率
D. 绿化率
推荐试题
【单选题】
You should hire a more ___ manager than the one you currently have.
A. sufficient
B. effective
C. respective
D. efficient
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Surgeons began to ___ their hands and arms with soap and water before operating.
A. scrub
B. enhance
C. rub
D. exhibit
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He might let something ___ in a moment of weakness.
A. slip
B. leak
C. to slip
D. to leak
【单选题】
Do not ___ the salad until you are ready to serve.
A. mix
B. toss
C. fling
D. eat
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The ___ for which he had fought all his life no longer seemed important to him.
A. aims
B. objectives
C. subjects
D. goals
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You should pause and ___ now.
A. tweet
B. ponder
C. squander
D. gossip
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Eating too much fat can ____heart disease and cause high blood pressure.
A. contribute to
B. attribute to
C. attest to
D. devote to
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It soon ___ that what she loved was not my person but my wealth.
A. widened
B. expanded
C. extended
D. developed
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I want to buy a new tie to ___ this brown suit.
A. go into
B. go after
C. go with
D. go through
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Our company decided to ___ the contract because a number of the conditions in it had not been met.
A. destroy
B. resist
C. assume
D. cancel
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My first ___ was to turn and run.
A. institute
B. institution
C. instinct
D. tuition
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I think it’s time I ___ in a new computer.
A. invested
B. insulted
C. interacted
D. impacted
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The jeweler will ____ the inside of the ring with her name.
A. carve
B. engrave
C. cut
D. engross
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He was bleeding from a _____ on his forehead.
A. lash
B. gash
C. ash
D. sash
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Let us go to the next ______ on the agenda.
A. matter
B. debate
C. speech
D. item
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They are _____ moving their office outside London.
A. considered
B. discussing
C. pondering
D. negotiating
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Although she _____ the old pot thoroughly, she could not make it look completely clean.
A. scrubbed
B. washed
C. made
D. screwed
【单选题】
The mistake will remain an indelible ____ on his memory.
A. stain
B. thing
C. issue
D. accident
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The wheel ____ through my frozen hand, and the car went right across the road.
A. slipped
B. sipped
C. dashed
D. disappeared
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The cupboard was ____ with old fishing tackle.
A. stuffed
B. stocked
C. stored
D. filled
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The decision depended on the ____ of a coin.
A. loss
B. lot
C. toss
D. sign
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Teaching can be a tiring and ____ job.
A. meaningless
B. stressed
C. rewarded
D. stressful
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The building is partly a museum and partly a private ____.
A. place
B. area
C. community
D. residence
【单选题】
Stop ______ your foot.
A. tossing
B. wiggling
C. exhibiting
D. reviewing
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It was a bloody ___ between the two armies.
A. rebellion
B. encounter
C. meet
D. fight
【单选题】
They conferred on the best way to ______ business.
A. extend
B. adjust
C. expand
D. adopt
【单选题】
We had a party last month, and it was a lot of fun, so let’s have ____ one this month.
A. another
B. the other B. more D. other
【单选题】
I decided to go to the library as soon as I ____.
A. finish what I did
B. finished what I did
C. would finish what I was doing
D. finished what I was doing
【单选题】
The speaker, ______ for her splendid speeches, was warmly received by the audience.
A. having known
B. being known
C. knowing
D. known
【单选题】
No sooner had we reached the top of the hill ______ we all sat down to rest.
A. when
B. then
C. than
D. until
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___ energy under the earth must be released in one form or another, for example, an earthquake.
A. Accumulated
B. Gathered
C. Assembled
D. Collected
【单选题】
Please ___ me for my rudeness. I really do not know the custom here.
A. engaged
B. comfort
C. execute
D. forgive
【单选题】
Sometimes it is very difficult to ___ some of the English words. Even the native speaker cannot help.
A. decrease
B. create
C. define
D. delight
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In the wife’s eyes, his ___ to their marriage life is far from perfect.
A. requirement
B. commitment
C. participation
D. reflection
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This newspaper often ___ the government’s opinion, not the public opinion.
A. affects
B. reacts
C. reflects
D. recognizes
【单选题】
It is predicted that heavy rains are ___ to flood the area in a few days.
A. frightening
B. threatening
C. scattering
D. warning
【单选题】
I chose to work abroad to improve my career ___.
A. future
B. path
C. prospect
D. expect
【单选题】
Long before I ever went there, Africa was alive in my ___.
A. image
B. imaginary
C. imaginative
D. imagination
【单选题】
The spectacle of the aurora may appear to dazzle and ___ the observer’s eye.
A. enchant
B. charm
C. fascinate
D. draw
【单选题】
The top prize has enhanced the musician’s ___.
A. fame
B. status
C. courage
D. faith
