下面关于hist命令叙述正确的是： A: hist(x)绘制向量x的频数直方图 B: hist(x)绘制数据x的频数统计表 C: hist(x)计算数据x的样本方差 D: hist(x,m)中参数m是一个标量，用于指定直方图中箱子的个数

Function hist() can be used to obtain the frequencies.（）

某学生成绩表中有6列：序号、学号、姓名、语文成绩、数学成绩、英语成绩，读入数据放在数据框x中，要对语文成绩做直方图分析，应使用的的命令是（ ） A: hist(x) B: hist(x$语文成绩) C: hist(x)$语文成绩 D: hist(x%语文成绩)

The program that a computer can execute directly is ( ) A: source program B: target program C: assembler D: executable program

A part program, a service program, and a control program are made up of major programs.

以下程序段的运行结果是（） A: PROgram B: PROGRAM C: PRO D: proGRAM

The（①）programmeansaprogramwritteninahigh-levellanguage.Itisgenerallytranslatedtoan（②）program,whichisinaformdirectlyunderstandablebythecomputer.Thetranslationisusuallydonebyprogramcalled（③）. The（） program means a program written in a high-level language.It is generally translated to an（）program,which is in a form directly understandable by the computer.The translation is usually done by program called （）. A: compiler B: assembler C: compile D: transfer

The（①）programmeansaprogramwritteninahigh-levellanguage.Itisgenerallytranslatedtoan（②）program,whichisinaformdirectlyunderstandablebythecomputer.Thetranslationisusuallydonebyprogramcalled（③）. The（） program means a program written in a high-level language.It is generally translated to an（）program,which is in a form directly understandable by the computer.The translation is usually done by program called （）. A: object B: basic C: C D: assemble

Which is the meaning of AEEP? A: APEC Edutainment Exchange Program B: ALCoB Edutainment Exchange Program C: APEC Education Exchange Program D: ALCoB Education Exchange Program

45. What is advertised in the poster? A: A. A language training program B: B. A youth internship program C: C. A summer camp program D: D. A volunteer program