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8501
By saying “I feel like living in a fishbowl”, Mary means ().
8502
血管紧张素I转化酶抑制剂不包括以下哪种?()
8503
单片机I/O口要驱动较大功率的器件时,应该先外接一个三极管驱动电路。
8504
在准双向口工作模式,I/O口在应用时需要外接上拉电阻。
8505
STC15系列单片机的 I/O 位数视封装不同而不同,I/O 口位数随封装引脚的增加而增加。
8506
STC15系列单片机并行I/O口有几种工作模式?
8507
为了减少代码修改量,在一些需要经常修改I/O口线的场合,应使用用户自定义的标号LED声明某个I/O口。下列哪条指令可实现前述功能?
8508
若采用P1.6和P1.7引脚外接两个按键,则程序中应该对I/O口进行初始化配置,下列指令中正确的是()
8509
当IAP15W4K58S4单片机复位后,所有I/O引脚都处于准双向口工作模式。
8510
在开漏工作模式,I/O口在应用时需要外接上拉电阻。
8511
在准双向口工作模式下,I/O口的灌电流能力与拉电流能力都是20mA。
8512
微型计算机由CPU、存储器、I/O 接口以及连接他们的总线组成。
8513
AT89C51单片机的并行I/O口中,既可用作地址/数据口,又可用作一般的I/O口的是()。
8514
AT89C51单片机共有()个8位的并行I/O口。
8515
8051单片机I/O端口作为通用输入输出口时,在该端口引脚输入数据时,应先向端口锁存器进行写()(填“1”或“0”)操作。
8516
MCS-51的并行I/O信息有两种读取方法,一种是读引脚,还有一种是()。
8517
单片机与普通微型计算机的不同之处在于其将()(填“微处理器”或“内存”或“硬盘”)、存储器和I/O口三部分,通过内部总线连接在一起,集成于一块芯片上。
8518
单片机就是在一片集成电路芯片上集成了中央处理器(CPU)、及 I/O接口电路,而构成的单芯片微型计算机。
8519
在V带传动设计中,一般选取传动比i≤7,imax受()限制。
8520
设计一对闭式软齿面齿轮传动。在中心距a和传动比i不变的条件下,提高齿面接触疲劳强度最有效的方法是()。
8521
设计齿轮传动时,若保持传动比i和齿数和zΣ=z1+z2不变,而增大模数m,则齿轮的()。
8522
伺服驱动器具有设定其特性和功能的各种参数,参数分为7类,即:分类0(基本设定);分类1(增益调整);分类2(振动抑制功能);分类3(速度、转矩控制、全闭环控制);分类4(I/F监视器设定);分类5(扩展设定);分类6(特殊设定)。设置参数的方法,一是通过与PC连接后在专门的调试软件上进行设置,二是在驱动器的前面板上进行。YL-335B的伺服参数设置不多,只在前面板上进行设置。
8523
电气控制电路接线的校核和测绘是电气安装和维修工程一项重要内容。实际工程中,借助PLC的状态监控功能来校核或测绘PLC的I/O接线,是非常实用的方法,其中软元件测试的强制输出功能特别适用于单点负载的测试,例如PLC输出负载为电磁阀线圈、继电-接触器线圈、指示灯等。对于输入点的测试和校核,也可以用手动方法使接近开关动作或复位,根据PLC输入点指示灯亮灭状态来确定接近开关的输入点分配,但这种观察方法比较容易出错,仍以借助编程软件为好。
8524
在线监控功能以确保编程软件和PLC之间的通信正常为前提,因此应首先创建新工程,接着进行编程软件和PLC之间的通信测试,测试成功才能实施I/O点状态监控。
8525
各种PLC的编程软件都有在线监控功能,只是表现形式、功能有所差异而已。在线监控可在“STOP”或“RUN”模式下进行,但“STOP”模式下仅能进行I/O点状态监控,不能监控程序的运行。
8526
工作单元机械装置与PLC装置之间的信息交换的方法是:机械装置上的各电磁阀和传感器的引线均连接到装置侧的接线端口上。PLC的I/O引出线则连接到PLC侧的接线端口上。两个接线端口间通过多芯信号电缆互连。
8527
关于I/O接口中控制端口的描述,正确的是()。
8528
除了I/O设备本身的性能外,影响嵌入式系统I/O数据传输速度的主要因素是()。
8529
关于I/O接口电路中保存的外设状态信息,说法正确的是()。
8530
关于I/O接口电路中保存的控制信息,说法正确的是()。
8531
在常用的I/O数据传输控制方式中,中断方式的特点是()。
8532
相对于独立编址,I/O端口采用统一编址的优点是()。
8533
某微机系统中,存储器地址为0x0000~0x1FFF,并行接口芯片地址为0x0100~0x0103,该系统中I/O编址方式为()。
8534
I/O接口按时序控制方式可分为同步接口和异步接口,这两类接口的区别是()。
8535
将微处理器芯片、内存储器及I/O接口芯片连接起来的总线是()。
8536
与存储器映像编址方式相比,I/O端口的独立编址方式的特点是()。
8537
I级铁路在路网中起骨干作用,近期年客货运量大于或等于()
8538
已知变频器功能码设定为:I-O-tCC=3C;FUn-PSS-PS2=LI5;FUn-PSS-PS4=LI6;FUn-PSS-PS8=LI4;FUn-PSS-SP2=10Hz;FUn-PSS-SP3=15Hz;FUn-PSS-SP4=25Hz;FUn-PSS-SP5=35Hz;FUn-PSS-SP6=40Hz。如需变频器输出频率为40Hz,则输入LI6~LI4的逻辑组合用二进制代码表示为()。
8539
已知变频器正反转控制设置为I-O-tCC=2C,如果设置FUn-PSS-PS2=LI2,SP2=45Hz,面板导航按钮设置频率50Hz,当LI2所接开关闭合时,变频器的运行频率为()Hz。
8540
ABO血型决定基因的i基因编码什么酶?
8541
阅下面的程序:list = [1 , 2 , 1 , 3]nums = set(list)for I in nums:print(I , end = )程序执行的结果为()
8542
对于序列s,能够返回序列s中第i到j以k为步长的元素子序列的表达是:()
8543
关于下面代码,以下选项中描述正确的是()。def fact(n, m=1):s = 1for i in range(1, n+1):s *= ireturn s//mprint(fact(m=5,n=10))
8544
下面代码的输出结果是()。def hello_world():print(‘ST’,end =”*”)def three_hellos():for i in range(3):hello_world()three_hellos()
8545
下面代码的输出结果是()。def fib(n):a, b = 1, 1for i in range(n-1):a, b = b, a + breturn aprint(fib(7))
8546
如果仅仅是用于控制循环次数,那么使用 for i in range (20) 和 for i in range (20,40) 的作是等价的。
8547
下列代码的输出结果是()。for i in Python:print(i,end= )
8548
下列程序的执行结果是()。for i in range(2):print(i,end=' ' )for I in range(4,6):print(I,end=' ' )
8549
下列循环的执行结果是()。sum = 0for i in range(100):if(i % 10):continuesum = sum + iprint(sum)
8550
Directions: Choose the correct words from the box to complete the conversation excerpts.You will not need all the words.haveafraid can do please howmeetlike nicesee thanks knowwould did thankwhat A. 9)() I get you something to drink?B. That 10)() be nic
8551
Directions: Complete the response to Jack's questions below.Why don't weIn my opinion How about I'm afraid I see I thinkVictor: () (5) what you mean, but we've got to start somewhere, and a new image is more important at this stage.
8552
Directions: Complete the response to Jack's questions below.Why don't weIn my opinion How about I'm afraid I see I think Andy: () (3) I can't agree.What we need is a wider product range.
8553
Directions: Complete the response to Jack's questions below.Why don't weIn my opinion How about I'm afraid I see I think Clara: () (4) dong both? We can stretch our brand and improve our image at the same time.
8554
Directions: Complete the response to Jack's questions below.Why don't weIn my opinion How about I'm afraid I see I think Jack: The proposal is the we change our logo and rethink our brand image.So, what are your views on this.Mary: () (1),
8555
Directions: Complete the response to Jack's questions below.Why don't weIn my opinion How about I'm afraid I see I think John: () (2) focus on our brand image first? That's the key issue!
8556
Directions: Read the following sentences and fill in the missing word or phrase.afraid doubt completely same out ofpoint problem sounds would be honest1.I have to say, it ()interesting, but we should wait.
8557
Directions: Read the following sentences and fill in the missing word or phrase.afraid doubt completely same out ofpoint problem sounds would be honest 2.I'm () that I can't agree with you on this suggestion.
8558
有一R、L、C串联的交流电路,已知R=XL=XC=10Ω,I=1A,电压UL=()V
8559
有一R、L、C串联的交流电路,已知R=XL=XC=10Ω,I=1A,电压UC=()V
8560
有一R、L、C串联的交流电路,已知R=XL=XC=10Ω,I=1A,电压UR=()V
8561
有一R、L、C串联的交流电路,已知R=XL=XC=10Ω,I=1A,电压U=()V
8562
假设第I类部分响应系统的输入是二进制的数字信息,则其预编码的电平数为(),相关编码的电平数为()。
8563
某期预付年金现值系数等于(1+i)乘以同期普通年金现值系数。()
8564
I’m a reliable person. I meet all deadlines. I’m easy to cooperate with and happy to work with any team. is probably Mary’s answer to question about her ().
8565
If you like sneakers (sports shoes) better than high heels, you can say: I choose high heels over sneakers.
8566
Which of the following sentences have the same meaning as the sentence ‘I will buy A and leave B' ?
8567
I can’t help ()the American TV series Game of Thrones (《权利的游戏》).
8568
The most () thing was the way they watched my friends and me. I got () at their staring.
8569
I () a room with a view of the street.
8570
Sorry, I’m late. I ()you waiting.
8571
‘I lost my new phone and my father scolded me.' ‘’Scold’ someone means to speak angrily to someone because you think he/she has done something wrong.
8572
Oh! Look at the time. I am afraid I have to go. Let’s (). Take care.-
8573
It was good running () you. You are probably busy. I won’t keep you any longer. See you.-
8574
It was nice () with you. I just saw my friend. Would you please excuse me?
8575
I love your handbag. It looks special. Where did you get it? (Please select the appropriate response.)
8576
Do you mind if I join you? (Please select the appropriate response.)
8577
Find the missing element in the following financial goal: “I plan to buy a mobile phone which costs ¥1500 by saving ¥75 from each paycheck(薪水).”
8578
8) I want to make friends from different countries who are also learning English.
8579
7) I want to make a lot of friends.
8580
4) Read one chapter of a novel that I am interested in every week.
8581
I cannot help but () the truth of your remarks, although they go against my interests.
8582
The use of modals in the following dialogue is appropriate.— Would you lend me your car this weekend?— Yes, I would.
8583
— The door was open.— It () open. I had locked it myself and the key was in my pocket.
8584
Fill in the blank with the correct form of the verb in the brackets.I () (enjoy) the party much more if there hadn't been quite such a crowd of people there.
8585
That was not the first time he () us. I think it's high time we () strong actions against him.
8586
It's getting dark, I'd rather you () now.
8587
Fill in the blank with the correct form of the verb in the brackets.I require that they () (come) by ten.
8588
Fill in the blank with the correct form of the verb in the brackets.I wish I () (know) what's wrong with my car.
8589
Choose between will + infinitive and be going to + infinitive to fill in the blank.A. What do you want all those corks for?B. I've bought a cask of wine and I ()(bottle) it myself.
8590
Does the following sentence express the concept of future time?I will not do anything solely for money.
8591
What is the tense and aspect of the following sentence?I was sitting in the classroom.
8592
I'd like () paper.
8593
Though the buildings are not as beautiful as I expect, I am much pleased with my surrounding.Which underlined word is not correct?
8594
Choose the appropriate verb in brackets to fill in the blank.He or I ()(am/is/are) going to answer the question.
8595
I will make your English better.Better in the above sentence is a(n)().
8596
I sent her some flowers for Mother's Day.The direct object of the above sentence is ().
8597
In the sentence I will make you a good teacher., a good teacher is a(n) ().
8598
In I take her to the zoo. the direct object is ().
8599
The subject of the sentence What he told me to do was that I should get fully prepared before the interview. is ().
8600
When I asked which of the children was his daughter, he pointed to a little girl ().
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