A frame with two，or sometimes four，arms through which are threaded the guidelines and which is used to keep the drill stem and bit in line with the center opening in the temporary guide base is the ______.A.drill stem guideB.guide frameC.drill string frameD.casing guide
A frame with two，or sometimes four，arms through which are threaded the guidelines and which is used to keep the drill stem and bit in line with the center opening in the temporary guide base is the ______.
A.drill stem guide
B.guide frame
C.drill string frame
D.casing guide
相关考题：
58. Which is the correct way to act in an earthquake?A. Run downstairs and cover your head and neck with your arms.B. Drive your car quickly through the overpass and get out of it.C. When you stay under a strong piece of furniture, you should hold on to it and be prepared to move with it.D. Climb over the back of the seat and cover your head and neck with your arms.
What are two characteristics of "store and forward" switching? (Select two answer choices)A．Latency fluctuates regardless of frame. size.B．The switch receives the complete frame. before beginning to forward it.C．Latency through the switch varies with frame. length.D．The switch checks the destination address upon receipt of headers.
选择正确的叙述. class Happy extends Frame. { Happy() { SetLayout(new GridLayout(2,2)); Panel p1 = new Panel(); add(p1); p 1.add( new Button("One")); Panel p2 = new Panel(); add(p2); p 2.add( new Button("Two")); add( new Button("Three")); add( new Button("Four")); s（）A.当frame调整大小时，按钮Three和Four 的大小也将调整。B.当frame调整大小时，所有按钮的大小都将调整。C.当frame调整大小时，按钮Two和Four 的大小也将调整。D.当frame调整大小时，按钮One和Two 的大小也将调整。
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A recently ordered server came standard with one 3.0GHz processor. It is capable of handling fourtotal processors. Which of the following processor combinations can be used in this server？（）A、 One， two， three or four processorsB、 One， two， or three processorsC、 One， three， or four processorsD、 One， two or four processors
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What are two characteristics of "store and forward" switching?（）A、Latency fluctuates regardless of frame size.B、The switch receives the complete frame before beginning to forward it.C、Latency through the switch varies with frame length.D、The switch checks the destination address upon receipt of headers.
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问答题On the left are two shapes with an arrow between them. Decided how the second is related to the first. After this there is a third shape, an arrow and four shapes. Find which of the four shapes goes with the third one to make a pair like the two on the left.
单选题A frame with two，or sometimes four，arms through which are threaded the guidelines and which is used to keep the drill stem and bit in line with the center opening in the temporary guide base is the（）.Adrill stem guideBguide frameCdrill string frameDcasing guide
单选题A recently ordered server came standard with one 3.0GHz processor. It is capable of handling fourtotal processors. Which of the following processor combinations can be used in this server？（）A One， two， three or four processorsB One， two， or three processorsC One， three， or four processorsD One， two or four processors
多选题What are two characteristics of "store and forward" switching?（）ALatency fluctuates regardless of frame size.BThe switch receives the complete frame before beginning to forward it.CLatency through the switch varies with frame length.DThe switch checks the destination address upon receipt of headers.