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【判断题】
牛顿首次发表了“关于两科学的对话”,首次用公式表达了梁的设计理论。()
A.
正确
B.
错误
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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
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【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
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【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
【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】The gear and screw pumps are classified as _____.
A.
variable stroke pumps
B.
multistage pumps
C.
positive displacement pumps
D.
triple-ported pumps
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【简答题】计算定期存款本金和利息之和。设银行定期存款的年利率rate为0.5%,并已知存款期为n年,存款本金为capital元,试编程计算n年后的本金和利息之和deposit。要求定期存款的年利率rate、存款期n和存款本金capital均由键盘输入。 语句组2
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【单选题】Which of the four classes of ATP-powered pumps share overall similarity: several subunits, the same general organization, and a similar function in being H+ transporters?
A.
ABC superfamily and P-class pumps
B.
ABC superfamily and P-class pump
C.
F-class pumps and P-class pumps
D.
F-class pumps and V-class pumps
查看完整题目与答案
【简答题】In general, pumps can be classified as or .
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【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
【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】The gear and screw pumps are classified as _____.
A.
variable stroke pumps
B.
multistage pumps
C.
positive displacement pumps
D.
triple-ported pumps
查看完整题目与答案
【简答题】计算定期存款本金和利息之和。设银行定期存款的年利率rate为0.5%,并已知存款期为n年,存款本金为capital元,试编程计算n年后的本金和利息之和deposit。要求定期存款的年利率rate、存款期n和存款本金capital均由键盘输入。 语句组2
查看完整题目与答案
【单选题】Which of the four classes of ATP-powered pumps share overall similarity: several subunits, the same general organization, and a similar function in being H+ transporters?
A.
ABC superfamily and P-class pumps
B.
ABC superfamily and P-class pump
C.
F-class pumps and P-class pumps
D.
F-class pumps and V-class pumps
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