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【单选题】
离心泵在机械方面造成振动和噪声异常的原因是________。A.
被排液体温度较高
B.
管路阻力变小使泵流量变大偏离额定流量太多
C.
吸入管较细与设计不符
D.
叶轮局部腐蚀、磨损或淤塞使动平衡破坏
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【简答题】A: I have a ticket for tonight ’ s show, please? B: Sure. How old are you? A: I ’ m 16 years old。 B: I’ m sorry but I sell you a ticket. You be 18 and over to see this show.
【单选题】The town government spent a lot of money_____ the old castle and other places of historic interest.
A.
preventing
B.
preserving
C.
presenting
D.
deserving
【单选题】The town government set up a new modern hospital for the farmers, _______? [ ]
A.
does it
B.
doesn't it
C.
did it
D.
didn't it
【单选题】The town government set up a modern hospital for the farmers, ________ it?
A.
does
B.
doesn’t
C.
did
D.
didn’t
【单选题】The town government has decided to _______ working hours so as to reduce traffic pressure in the rush hour.
A.
change
B.
stagger
C.
alter
D.
exchange
【简答题】I ’ m sorry but ... . I work as a dentist ’ s assistant and people often say very funny things when they come to see the dentist. Here are some of them. Roland had an 11 o'clock appointment. He phoned...
【简答题】在用户输入学生信息后,可以有两个选择,如果选择 “详细信息”单选钮,单击“确定”按钮后页面转向学生详细信息页面;如果选择“维护学生信息”单选钮,则转向到维护学生信息页面。它由四个程序组成: ex3.html :用户登录时在界面中可以选择重新定向的不同页面; (效果如下图所示) ex3_1.jsp :判断用户选择的页面,根据用户的选择确定转向的目标页面; ex3_2.jsp 和 ex3_3.jsp ...
【简答题】A．The lack of help from the town government. B．The cyclists' carelessness. C．The truck drivers' anger. D．all of the above.
【单选题】The town government set up a new modern hospital for the farmers,_______?
A.
does it
B.
doesn’t it
C.
didn’t it
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