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【单选题】
下列说法中正确的是（　　）
A.
两个能够互相重合的图形一定成中心对称
B.
成中心对称的两个图形一定能够互相重合
C.
把一个图形绕着某一点旋转一定的角度，如果它能够与另一个图形重合，那么这两个图形一定成中心对称
D.
如果两个图形的对应点连线都经过某一点，那么这两个图形关于这一点成中心对称
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【单选题】/20140249在Excel中,设单元格C1中输入公式“=ROUND(653.54897,2)”,按回车键后,C1单元格中的值为_(49)_。
A.
0.54
B.
65.0
C.
653.54
D.
653.55
查看完整题目与答案
【单选题】用两相交的剖切平面(其交线垂直于某一基本投影面)剖开机件的方法称为_____。
A.
全剖视图
B.
半剖视图
C.
旋转剖视图
D.
复合剖视图
查看完整题目与答案
【单选题】Which of the following statements is/are true regarding hydraulic pumps in general?
A.
Variable volumes can be obtained with gear pumps only by variation of the pump drive speed.
B.
A radial piston pump houses sliding pistons in a stationary cylinder block through which passes a rotating pintle or ported shaft
C.
The amount of fluid displaced per revolution of an axial piston rotary pump is dependent on the angle formed between the cylinder block and valve plate
D.
All of the above
查看完整题目与答案
【单选题】Which of the following statements is/are true regarding hydraulic pumps in general?
A.
Variable volumes can be obtained with gear pumps only by variation of the pump drive speed.
B.
A radial piston pump houses sliding pistons in a stationary cylinder block through which passes a rotating pintle or ported shaft.
C.
The amount of fluid displaced per revolution of an axial piston rotary pump is dependent on the angle formed between the cylinder block and valve plate.
D.
All of the other alternatives
查看完整题目与答案
【判断题】去盥洗室上厕所时间很短，可以不用锁门。
A.
正确
B.
错误
查看完整题目与答案
【单选题】20140249在Excel中,设单元格C1中输入公式“=ROUND(653.54897,2)”,按回车键后,C1单元格中的值为_(49)_。
A.
0.54
B.
65
C.
653.54
D.
653.55
查看完整题目与答案
【单选题】在Excel中,设单元格C1中输入公式“=ROUND(653.54897,2)”,按回车键后,C1单元格中的值为_(49)_。
A.
0.54
B.
65.0
C.
653.54
D.
653.55
查看完整题目与答案
【单选题】在Excel中，设单元格F1的值为56.323，若在单元格F2中输入公式“=TEXT（F1,”￥0.00”)”，则单元格F2值为（）。
A.
￥56
B.
￥56.323
C.
￥56.32
D.
￥56.00
查看完整题目与答案
【简答题】In general, pumps can be classified as or .
查看完整题目与答案
【判断题】In general, pumps can be classified as centrifugal or axial.
A.
正确
B.
错误
查看完整题目与答案
相关题目：
【单选题】/20140249在Excel中,设单元格C1中输入公式“=ROUND(653.54897,2)”,按回车键后,C1单元格中的值为_(49)_。
A.
0.54
B.
65.0
C.
653.54
D.
653.55
查看完整题目与答案
【单选题】用两相交的剖切平面(其交线垂直于某一基本投影面)剖开机件的方法称为_____。
A.
全剖视图
B.
半剖视图
C.
旋转剖视图
D.
复合剖视图
查看完整题目与答案
【单选题】Which of the following statements is/are true regarding hydraulic pumps in general?
A.
Variable volumes can be obtained with gear pumps only by variation of the pump drive speed.
B.
A radial piston pump houses sliding pistons in a stationary cylinder block through which passes a rotating pintle or ported shaft
C.
The amount of fluid displaced per revolution of an axial piston rotary pump is dependent on the angle formed between the cylinder block and valve plate
D.
All of the above
查看完整题目与答案
【单选题】Which of the following statements is/are true regarding hydraulic pumps in general?
A.
Variable volumes can be obtained with gear pumps only by variation of the pump drive speed.
B.
A radial piston pump houses sliding pistons in a stationary cylinder block through which passes a rotating pintle or ported shaft.
C.
The amount of fluid displaced per revolution of an axial piston rotary pump is dependent on the angle formed between the cylinder block and valve plate.
D.
All of the other alternatives
查看完整题目与答案
【判断题】去盥洗室上厕所时间很短，可以不用锁门。
A.
正确
B.
错误
查看完整题目与答案
【单选题】20140249在Excel中,设单元格C1中输入公式“=ROUND(653.54897,2)”,按回车键后,C1单元格中的值为_(49)_。
A.
0.54
B.
65
C.
653.54
D.
653.55
查看完整题目与答案
【单选题】在Excel中,设单元格C1中输入公式“=ROUND(653.54897,2)”,按回车键后,C1单元格中的值为_(49)_。
A.
0.54
B.
65.0
C.
653.54
D.
653.55
查看完整题目与答案
【单选题】在Excel中，设单元格F1的值为56.323，若在单元格F2中输入公式“=TEXT（F1,”￥0.00”)”，则单元格F2值为（）。
A.
￥56
B.
￥56.323
C.
￥56.32
D.
￥56.00
查看完整题目与答案
【简答题】In general, pumps can be classified as or .
查看完整题目与答案
【判断题】In general, pumps can be classified as centrifugal or axial.
A.
正确
B.
错误
查看完整题目与答案