【多选题】偶然误差具有下列( )特性。
A.
绝对值大的误差比绝对值小的误差出现的概率要大
B.
在一定的观测条件下,偶然误差的绝对值不会超过一定的限度
C.
绝对值较小的误差比绝对值较大的误差出现的机会大
E.
偶然误差的算术平均值随观测次数的无限增加而变大
【多选题】What to introduce on the way to hotel?
B.
Brief introduction of the city.
C.
Brief introduction of the itinerary.
【单选题】The best way to introduce a new user to a computer system is to draw an ______ between the computer and some situation familiar to the user.
【判断题】The description of a language at some point of time in history is a diachronic study ,but the description of language as it changes though time is a synchronic
【判断题】服务器提供各种服务,包括文件服务器、邮件服务器、Web服务器等。
【单选题】Which of the following is not a good way to introduce the topic of your presentation?
A.
I want to begin with a story that…
B.
Introduce a startling or interesting fact about the topic to make people think.
C.
Ask the audience questions, then wait for someone to answer before you move forward with your speech.
【单选题】The description of a language at some point of time in history is a study; the description of a language as it changes through time is a historical study.
【简答题】The description of a language at some point of the time in history is a _________ study ; the description of a language as it changes through time is a _________ study.