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【简答题】
在控制系统设计时要注意的是()。 A. 选好控制量; B. 选择好控制变量; C. 了解被控对象特性对系统的影响 ; D. 要尽量选择PI 控制器
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皮皮学刷刷变学霸
举一反三
【多选题】二手资料的缺点主要包括()。
A.
许多市场缺乏详细资料
B.
现有资料的可靠资料不稳定
C.
现有资料的可比性和通用性不易把握
D.
相当耗费调研时间
【单选题】He came back home fatigued.
A.
exhausted
B.
scared
C.
worried
D.
frightened
【简答题】如何在已储存的节目中快速实现点播回放?如点播“熏衣草”相关视频。
【简答题】完形填空。 Look at this. It's 1 school bag. It is 2 . What's in it? Look! This is 3 English book. 4 yellow 5 blue. 6 this ? It's a pencil box. There are many things in it. This is a pen. It's red. This is ...
【单选题】用于汽车上的蓄电池,必须满足启动发动机的需要,即在( )s的短时间内提供汽车起动机足够大的电流。
A.
5-10
B.
10-15
C.
15-20
D.
10-20
【单选题】变压器的相数一般分为( )两种。
A.
单相和两相
B.
单相和三相
C.
两相和三相
【判断题】起动发动机时,蓄电池在短时间内(5~10s)能向起动机连续供给强大电流。(  )
A.
正确
B.
错误
【简答题】阅读理解。 Henry had studied in a university before he came back to his hometown. He thought he had lots of knowledge and he was supercilious(目中无人). At first he was easily given a job in a bank. But he cou...
【多选题】在Adobe Primiere PRO A.5中,使用菜单命令FILE》frame可以将影片的当前帧输出为那种单帧的图片格式()
A.
PSD
B.
BMP
C.
GIF
D.
TIFF
【单选题】听力原文:M: Hello, girls, is that box heavy? W: No, it's light. But it's full of fruit. Q: What's in the box? (24)
A.
Fruit.
B.
Books.
C.
Maps.
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