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【判断题】
系统稳定的充分必要条件是系统特征方程的根全部为正。A.
正确
B.
错误
手机使用
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反馈参考答案：
举一反三
【简答题】A tax which is easy to collect should not involve a lot of trouble and______.
【多选题】839进行模板支撑和拆卸时的悬空作业必须遵守的规定有( )。
A.
严禁在连接件和支撑上攀登上下
B.
严禁在上下同一垂直面上装、拆模板
C.
支设高度在3米以下的柱模板、四周应设斜撑,并应设立操作平台
D.
模板上留有预留洞时,应在安装后将洞口覆盖
E.
拆模的高处作业,应配置登高用具或搭设支架
【多选题】Which of the following sentences involve passive voice? (Choose more than one)
A.
Many novels were written by Charles Dickens.
B.
Shall I open the door for you?
C.
The tennis tournament was rained off.
D.
I’ll help you with your homework.
【单选题】which one doesn't involve in Speech Communication Process
A.
Name
B.
Speaker
C.
Message
D.
Smile
【单选题】Which of the following involve a trade-off?
A.
buying a new car
B.
going to college
C.
watching a football game on Saturday afternoon
D.
taking a nap
E.
All of the above involve trade-offs.
【多选题】Which one(s) of the following works involve(s) the place Langham?
A.
The Sign of the Four
B.
"A Scandal in Bohemia"
C.
Wuthering Heights
D.
Lord of the Rings
【多选题】进行模板支撑和拆卸时的悬空作业( )是正确的。
A.
严禁在连接件和支撑上攀登上下
B.
严禁在上下同一垂直面上装、拆模板
C.
支设临空构筑物模板时，应搭设支架或脚手架
D.
模板上留有预留洞时，应在安装后将洞口覆盖
E.
拆模的高处作业，应配置登高用具或搭设支架
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