答案查看网,轻松搜题/搜资源
登录
×
登录账号
记住密码
立即注册
忘记密码
×
注册
使用微信扫描二维码,获取账号密码后免费查看答案
前往登录
忘记密码
×
忘记密码
使用微信扫描下方二维码,即可找回您的账号密码
前往登录
立即注册
搜题/搜资源
【单选题】【消耗次数:1】
The millions of calculations involved, ____ by hand, would have lost all practical value by the time they were finished.
①
had they been done
②
they had been done
③
having been done
④
they were done
参考答案:
复制
纠错
相关题目
【单选题】
The millions of circulations involved, _____ by hand, would have lost all practical value by the time they were finished.
①
had they been done
②
they had been done
③
having been done
④
they were done
查看完整题目与答案
【单选题】
The millions of circulations involved, _____ by hand, would have lost all practical value by the time they were finished.
①
had they been done
②
they had been done
③
having been done
④
they were done
查看完整题目与答案
【单选题】
24.In those days all the work had to be done ___hand.
①
with
②
in
③
by
④
on
查看完整题目与答案
【单选题】
They have done things they ought_____.
①
not to do
②
not to be done
③
not to have done
④
not having done
查看完整题目与答案
【单选题】
If the whole program __________ beforehand, a great deal of time and money would have been lost.
①
was not planned
②
were not planned
③
would not be planned
④
had not been planned
查看完整题目与答案
【单选题】
A: Could you put the books on bookshelves, please? B: Of course. [填空] A: Thats all. Everything else has been done.
①
Its a pleasure to help.
②
Is that all?
③
Im free now.
④
How should I do it?
查看完整题目与答案
【单选题】
The residents, _____had been damaged by the fire, were given help by the Red Cross.
①
all of their homes
②
all their homes
③
whose all homes
④
all of whose homes
查看完整题目与答案
【单选题】
The residents, _____had been damaged by the fire, were given help by the Red Cross.
①
all of their homes
②
all their homes
③
whose all homes
④
all of whose homes
查看完整题目与答案
【单选题】
After the student was praised for what he had done, he said:“ I______ even better under harder conditions. ”
①
had done
②
did
③
would have done
④
would do
查看完整题目与答案
【判断题】
John has never acted as he should have done. 此句中的“done”替代了“has”.
①
正确
②
错误
查看完整题目与答案
随机题目
【判断题】
数据采样插补算法主要应用于步进电动机驱动的经济型数控机床中。
①
正确
②
错误
查看完整题目与答案
【判断题】
点位控制机床是指仅控制刀具相对于工件的定位点坐标,不规定刀具的运动轨迹的数控机床。
①
正确
②
错误
查看完整题目与答案
【判断题】
M代码表示准备功能。
①
正确
②
错误
查看完整题目与答案
【判断题】
感应同步器为数字式检测装置。
①
正确
②
错误
查看完整题目与答案
【判断题】
G92指令的功能是记录坐标设定值。
①
正确
②
错误
查看完整题目与答案
【判断题】
AutoCAD中,在绘图时,一旦打开正交方式ORTHO后,屏幕上只能画水平线和垂直线。()
①
正确
②
错误
查看完整题目与答案
【判断题】
在AutoCAD中,栅格与捕捉两者的间距不是对应的关系,但是为了使用方便,经常设置成一致的。()
①
正确
②
错误
查看完整题目与答案
【判断题】
半闭环和全闭环位置反馈系统的根本差别在于位置传感器安装的位置不同,半闭环的位置传感器安装在工作台上,全闭环的位置传感器安装在电机的轴上。
①
正确
②
错误
查看完整题目与答案
【判断题】
钻铰刀具切削速度按钻头直径选择,进给量按铰刀直径选择。()
①
正确
②
错误
查看完整题目与答案
【判断题】
程序编制中首件试切的作用是检验程序的正确性,并能综合检验零件的加工精度。
①
正确
②
错误
查看完整题目与答案