【单选题】【消耗次数：1】
The professor has been [填空]at the university for over thirty years.
①
teach
②
taught
③
teaching
④
will teach
参考答案：
复制
纠错
相关题目
【单选题】
She was teaching me ____ you would teach a younger child to speak the language.
①
the way
②
in the way
③
a way
④
to the way
【单选题】
Lucy has been a student there for nearly one and [填空] half years．
①
a
②
an
③
the
④
/
【单选题】
he park has been built and it will be open _____ three years
①
A. in
②
B.for
③
C.on
④
D.after
【单选题】
This technology has been ?around for a long time, but not until recent years _______ it in marketing.
①
businesses employed
②
did businesses employ
③
businesses had employed?
④
had businesses employed
【单选题】
They teach the computer to think and ( ) develop and sharpen their own reasoning abilities.
①
result in
②
result from
③
as a result
④
with result
【单选题】
Young people ______ 62% of University teaching staff.
①
comprise
②
compose
③
contain
随机题目
【单选题】
以下有关视频信息的压缩编码错误的是（100分）
①
图像压缩编码的目的是识别并去除冗余信息，减少存储量和所需带宽
②
图像压缩编码分类为：时间冗余编码、空间冗余编码、视觉冗余编码
③
空间冗余编码的缺点是帧内压缩的编码效率较低，压缩比仅2-3倍
④
压缩的编码效率较高，对于前后内容变化较大的画面，压缩后画面的连续性也较强
【判断题】
目前数字视频的三种不同的标准有1. ATSC(Advanced Television Systems Committee, 广播行业组织，美国高级电视系统委员会)标准 ,该标准中14种采用逐行扫描方式。2. DVB（The Digital Video Broadcasting Project，数字视频广播节目）标准（是以欧洲为典型的数字视频标准） 3. ISDB (Integrated Services Digital Broadcasting，综合业务数字广播)标准（100分）
①
正确
②
错误
【判断题】
Video For Windows、Adobe Premiere Pro、Quick Time、Ulead Video studio、Windows Live属于常见的视频处理软件（100分）
①
正确
②
错误