Ever since human inhabited the earth, they have made use of various forms of communication. Generally, this expression of thoughts and feelings has been in the form of oral speech. When there is a language harrier, communication is accomplished through sign language in which motions stand for letters, words and ideas. Tourists, the deaf and the mute have to use this form of expression. Many of these symbols of whole words are very picturesque and exact and can be used internationally; spelling, however, cannot.
Body language transmits ideas or thoughts by certain actions, either intentionally or unintentionally. A wink can be a way of flirting or indicating that the person is only joking. A nod signifies approval, while shaking the head indicates a negative reaction.
Other forms of nonlinguistic language can be found in Braille (a system of raised dots read with the finger tips), signal flags, Morse code and smoke signals. Road maps and picture signs also guide, warn and instruct people.
While verbalization is the most common form of language, other systems and techniques also express human thoughts and feelings.

Which form other than oral speech would be most commonly used among blind people（）

A:Picture signs. B:Braille. C:Body language. D:Signal language.

Ever since humans have live on the earth, they have made use of various forms of communication. Generally, this expression of thoughts and feelings has been in the form of oral speech. When there is a language barrier, communication is accomplished through sign language in which motions stand for letters, words, and ideas. Tourists and the people unable to hear or speak have had to resort to this form of expression. Many of these symbols of whole words are very vivid and exact and can be used internationally; spelling, however, cannot.
Body language transmits ideas or thoughts by certain actions, either intentionally or unintentionally. A wink can be a way of indicating that the part is only joking. A nod Signifies approval, while shaking the head indicates a negative reaction.
Other forms of nonlinguistic language can be found in Braille (a system of raised dots read with the fingertips), signal flags, Morse code, and smoke signals, Road maps and picture signs also guide, warn, and instruct people. While language is the most common form of communication, other systems and techniques also express human thoughts and feelings.

Which form other than era4 speech could be most commonly used among blind people（）

A:Picture signs. B:Braille. C:Body language. D:Signal flags.

Ever since humans have live on the earth, they have made use of various forms of communication. Generally, this expression of thoughts and feelings has been in the form of oral speech. When there is a language barrier, communication is accomplished through sign language in which motions stand for letters, words, and ideas. Tourists and the people unable to hear or speak have had to resort to this form of expression. Many of these symbols of whole words are very vivid and exact and can be used internationally; spelling, however, cannot.
Body language transmits ideas or thoughts by certain actions, either intentionally or unintentionally. A wink can be a way of indicating that the part is only joking. A nod Signifies approval, while shaking the head indicates a negative reaction.
Other forms of nonlinguistic language can be found in Braille (a system of raised dots read with the fingertips), signal flags, Morse code, and smoke signals, Road maps and picture signs also guide, warn, and instruct people. While language is the most common form of communication, other systems and techniques also express human thoughts and feelings.
Which form other than era4 speech could be most commonly used among blind people

A:Picture signs. B:Braille. C:Body language. D:Signal flags.

Ever since human inhabited the earth, they have made use of various forms of communication. Generally, this expression of thoughts and feelings has been in the form of oral speech. When there is a language harrier, communication is accomplished through sign language in which motions stand for letters, words and ideas. Tourists, the deaf and the mute have to use this form of expression. Many of these symbols of whole words are very picturesque and exact and can be used internationally; spelling, however, cannot.
Body language transmits ideas or thoughts by certain actions, either intentionally or unintentionally. A wink can be a way of flirting or indicating that the person is only joking. A nod signifies approval, while shaking the head indicates a negative reaction.
Other forms of nonlinguistic language can be found in Braille (a system of raised dots read with the finger tips), signal flags, Morse code and smoke signals. Road maps and picture signs also guide, warn and instruct people.
While verbalization is the most common form of language, other systems and techniques also express human thoughts and feelings.
Which form other than oral speech would be most commonly used among blind people

A:Picture signs. B:Braille. C:Body language. D:Signal languag

Ever since human inhabited the earth, they have made use of various forms of communication. Generally, this expression of thoughts and feelings has been in the form of oral speech. When there is a language harrier, communication is accomplished through sign language in which motions stand for letters, words and ideas. Tourists, the deaf and the mute have to use this form of expression. Many of these symbols of whole words are very picturesque and exact and can be used internationally; spelling, however, cannot.
Body language transmits ideas or thoughts by certain actions, either intentionally or unintentionally. A wink can be a way of flirting or indicating that the person is only joking. A nod signifies approval, while shaking the head indicates a negative reaction.
Other forms of nonlinguistic language can be found in Braille (a system of raised dots read with the finger tips), signal flags, Morse code and smoke signals. Road maps and picture signs also guide, warn and instruct people.
While verbalization is the most common form of language, other systems and techniques also express human thoughts and feelings.

Which form other than oral speech would be most commonly used among blind people（　）

A:Picture signs. B:Braille. C:Body language. D:Signal language.

信号量是操作系统中用于互斥和同步机制的一个共享的整数变量。信号量仅可以由初始化、唤醒(Signal)和等待(Wait)三种操作访问。
对于给定的信号量S，等待操作Wait(S)(又称P操作)定义为：
if s>0 then (17) else挂起调用的进程
唤醒操作Signal(S)(又称V操作)定义为：
if 存在等待的进程 then 唤醒这个进程else (18)
给定信号量S，可以定义一个临界区来确保其互斥，即保证在同一时刻这个临界区只能够被一个进程执行。当S被初始化为1时，代码段
(19) ：
临界区
(20) ：
定义了一个临界区。
这样的临界区实际上是将共享数据和对这些数据的操作一起封装起来，通过其互斥机制一次只允许一个进程进入，这种临界区通常称为 (21) 。

18（）

A:S:=0 B:S:=S+1 C:S:=S-1 D:S:=1 E:Signal(S+1) F:Wait(S-1) G:Signal(S) H:Wait(S)

信号量是操作系统中用于互斥和同步机制的一个共享的整数变量。信号量仅可以由初始化、唤醒(Signal)和等待(Wait)三种操作访问。
对于给定的信号量S，等待操作Wait(S)(又称P操作)定义为：
if s>0 then (17) else挂起调用的进程
唤醒操作Signal(S)(又称V操作)定义为：
if 存在等待的进程 then 唤醒这个进程else (18)
给定信号量S，可以定义一个临界区来确保其互斥，即保证在同一时刻这个临界区只能够被一个进程执行。当S被初始化为1时，代码段
(19) ：
临界区
(20) ：
定义了一个临界区。
这样的临界区实际上是将共享数据和对这些数据的操作一起封装起来，通过其互斥机制一次只允许一个进程进入，这种临界区通常称为 (21) 。

19（）

A:S:=0 B:S:=S+1 C:S:=S-1 D:S:=1 E:Signal(S+1) F:Wait(S-1) G:Signal(S) H:Wait(S)

信号量是操作系统中用于互斥和同步机制的一个共享的整数变量。信号量仅可以由初始化、唤醒(Signal)和等待(Wait)三种操作访问。
对于给定的信号量S，等待操作Wait(S)(又称P操作)定义为：
if s>0 then (17) else挂起调用的进程
唤醒操作Signal(S)(又称V操作)定义为：
if 存在等待的进程 then 唤醒这个进程else (18)
给定信号量S，可以定义一个临界区来确保其互斥，即保证在同一时刻这个临界区只能够被一个进程执行。当S被初始化为1时，代码段
(19) ：
临界区
(20) ：
定义了一个临界区。
这样的临界区实际上是将共享数据和对这些数据的操作一起封装起来，通过其互斥机制一次只允许一个进程进入，这种临界区通常称为 (21) 。

20（）

A:S:=0 B:S:=S+1 C:S:=S-1 D:S:=1 E:Signal(S+1) F:Wait(S-1) G:Signal(S) H:Wait(S)