In a pneumatic automation system, a unit producing a signal

题目
单选题
In a pneumatic automation system, a unit producing a signal to govern the position of the controller of the measured variable, relative to the value of the measured variable, is said to have().
A

reset action

B

proportional action

C

two position action

D

rate action

参考答案和解析
正确答案: A
解析: 暂无解析
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相似问题和答案

第1题:

permit a user to compose and transmit a message on an office automation system.

A.Electronic mail

B.Datagram

C.MSN message

D.Search engine


正确答案:A
解析:译文:在办公自动化系统中,我们可以使用电子邮件编辑和传送消息。

第2题:

A complete computer system contains(74)。

A.arithmetic unit, control unit and memory

B.input/output devices and mainframe

C.mainframe. and programs of utility

D.hardware system and software system


正确答案:D
解析:本题考查专业英语应用能力和计算机系统的构成。任何一个计算机系统都是由两个部分组成的:计算机硬件系统和计算机软件系统。硬件系统有:运算器、控制器、存储器(内存储器和外存储器)、输入设备(键盘、鼠标、绘图仪等)、输出设备(显示器、打印机等)。软件系统有:应用软件、系统软件。参考答案的译文:A:算术单元、控制单元和存储器,B:输入/输出设备和主机。C:主机和可用程序。D:硬件系统和软件系统。题目参考译文:完整的计算机系统应包括硬件系统和软件系统。

第3题:

The basic unit of measure in a computer system is the(72). It is the smallest unit in computing. There are some other measures in a computer, such as Kilobyte, Megabyte, Gigabyte and so on.

A.Kilobyte

B.Bit

C.Gigabyte

D.Megabyte


正确答案:B
解析:本题问的是计算机系统中基本计量单位是什么,显然是Bit。所以应该选择B。

第4题:

CDMA for cellular system can be described as follows. As with FDMA, each cell is allocated a frequency (71) , when is split into two parts, half for reverse (mobile unit to base station) and half for (72) (base station to mobile unit). For full-duplex (73) , a mobile unit both reverse and forward channels. Transmission is in the form. of direct-sequence spread (74) , which used a chipping code to increase the data rate of the transmission, resulting is an increased signal bandwidth. Multiple access is provided by assigning (75) chipping codes to multiple users, so that the receiver can recover the transmission of an individual unit from multiple transmissions.

A.ware

B.signal

C.bandwidth

D.domain


正确答案:C
用于蜂窝系统的CDMA技术可以描述如下。就像FDMA一样,每一个小区被分配了一个频带,该频带划分为两半,一半用于反向信道(从移动终端到基站),一半用于正向信道(从基站到移动终端)。在全双工通信中,移动终端使用了反向和正向两个信道。传输以直接序列扩频方式进行,用一个码片来增加传输的数据速率,同时也产生了额外的信号带宽。通过把正交的各个码片指定给不同的用户就可以实现多路访问,这样接收者就能够从多个传输中提取并恢复需要的传输单元。

第5题:

all of the following are function of crm system except ()

A.automation procurement

B.automation sales

C.automation marketing

D.automation customer service


正确答案:A
所有以下是客户关系管理系统功能除了()A、自动化采购B、自动化销售C、自动化营销D、自动化客户服务

第6题:

The smallest unit of information in a computer system is called a(72)

A.Bit

B.Byte

C.block

D.file


正确答案:A
解析:计算机系统中信息的最小单位称为比特。

第7题:

All of the following are functions of CRM system except ( 71 )。

A.automation procurement

B.automation sales

C.automation marketing

D.automation customer service


正确答案:A

第8题:

LTE中『____』基于主同步信号和辅同步信号进行的。(What carries on basing on the main synchronized signal and the auxiliary synchronized signal in LTE system『____』.)


参考答案:小区搜索
cell searching

第9题:

Which of the following is the smallest separately installable unit on an AIX system?()

A.File

B.Fileset

C.Bundle

D.Licensed program product


参考答案:B

第10题:

● The basic unit of measure in a computer system is the(72). It is the smallest unit in computing. There are some other measures in a computer, such as Kilobyte, Megabyte, Gigabyte and so on.

(72)

A.Kilobyte

B.Bit

C.Gigabyte

D.Megabyte


正确答案:B

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