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【多选题】
塔式起重机升降作业时,应符合下列要求:
A.
顶升前应预先放松电缆，其长度宜大于顶升总高度，并应紧固好电缆卷筒。下降时应适时收紧电缆；
B.
在作业中风力突然增大达到6.0m/s及以上时，必须立即停止，并应紧固上、下塔身各连接螺栓
C.
升降应在白天进行，特殊情况需在夜间作业时，充分的照明；
D.
升降作业过程，必须有专人指挥，专人照看电源，专人操作液压系统，专人拆装螺栓。非作业人员不得登上顶升套架的操作平台。操纵室内应只准二人操作，必须听从指挥信号；
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参考答案：
举一反三
【单选题】—What is used in cloning? —DNA. You have your own DNA that ______ your parents. [     ] A. is the same as
B.
is similar to
C.
is the same to
D.
is similar as
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【简答题】When you close your eyes and try to think of the shape of your own body, what you imagine (or rather, what you feel) is quite different from what you see when you open your eyes and look in the mirror...
查看完整题目与答案
【单选题】You must retell the text with _____. [     ]
A.
own your words
B.
words your own
C.
your own words
D.
your words
查看完整题目与答案
【单选题】______ what your families said just now, I think, and you will make your own decision.
A.
Consider
B.
Considering
C.
To consider
D.
Considered
查看完整题目与答案
【单选题】_______they say, just take your own way.
A.
No matter
B.
What
C.
However
D.
No matter what
查看完整题目与答案
【单选题】According to the context, what does 'your own biology' mean in the last paragraph?
A.
Your current major.
B.
Your preference.
C.
Your future research.
D.
Your future job.
查看完整题目与答案
【单选题】It is worth considering what makes 'convenience' foods so popular, and _____ better ones of your own. [     ]
A.
introduces
B.
to introduce
C.
introducing
D.
introduced
查看完整题目与答案
【单选题】移动选区的过程中按下什么键可保持水平或垂直或45度方向
A.
ctrl
B.
shift
C.
alt
D.
enter
查看完整题目与答案
【单选题】在双代号网络图中,实箭线的特点是( )。
A.
既不消耗时间，也不消耗资源
B.
只消耗时间，不消耗资源
C.
不消耗时间，只消耗资源
D.
必然消耗时间，往往也要消耗资源
查看完整题目与答案
【单选题】What's the correct interpretation of the sentence "... to learn the ins and out sof hauling your own water and generating your own power"? (Para.6)
A.
... to learn how to pump water into and out of water tanks and how to install a power generator.
B.
... to learn each and every sapect of hauling your own water and generation your own power.
查看完整题目与答案
相关题目：
【单选题】—What is used in cloning? —DNA. You have your own DNA that ______ your parents. [     ] A. is the same as
B.
is similar to
C.
is the same to
D.
is similar as
查看完整题目与答案
【简答题】When you close your eyes and try to think of the shape of your own body, what you imagine (or rather, what you feel) is quite different from what you see when you open your eyes and look in the mirror...
查看完整题目与答案
【单选题】You must retell the text with _____. [     ]
A.
own your words
B.
words your own
C.
your own words
D.
your words
查看完整题目与答案
【单选题】______ what your families said just now, I think, and you will make your own decision.
A.
Consider
B.
Considering
C.
To consider
D.
Considered
查看完整题目与答案
【单选题】_______they say, just take your own way.
A.
No matter
B.
What
C.
However
D.
No matter what
查看完整题目与答案
【单选题】According to the context, what does 'your own biology' mean in the last paragraph?
A.
Your current major.
B.
Your preference.
C.
Your future research.
D.
Your future job.
查看完整题目与答案
【单选题】It is worth considering what makes 'convenience' foods so popular, and _____ better ones of your own. [     ]
A.
introduces
B.
to introduce
C.
introducing
D.
introduced
查看完整题目与答案
【单选题】移动选区的过程中按下什么键可保持水平或垂直或45度方向
A.
ctrl
B.
shift
C.
alt
D.
enter
查看完整题目与答案
【单选题】在双代号网络图中,实箭线的特点是( )。
A.
既不消耗时间，也不消耗资源
B.
只消耗时间，不消耗资源
C.
不消耗时间，只消耗资源
D.
必然消耗时间，往往也要消耗资源
查看完整题目与答案
【单选题】What's the correct interpretation of the sentence "... to learn the ins and out sof hauling your own water and generating your own power"? (Para.6)
A.
... to learn how to pump water into and out of water tanks and how to install a power generator.
B.
... to learn each and every sapect of hauling your own water and generation your own power.
查看完整题目与答案
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