A gear pump belongs to （） according to its working principle. -题库考试答案搜索网

A gear pump belongs to （） according to its working principle.

单选题

2022-01-05 03:11

A、reciprocating pumps
B、positive displacement pumps
C、centrifugal pumps
D、centripetal pum

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正确答案

B

试题解析

标签：船舶辅助机械

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若有以下程序，当程序运行后，单击命令按钮，则输出的结果为( )。 Private Sub Command1_Click() Dim a%(1 To 4), b%(3 To 6), i%, s1#, s2# For i= 1 To 4 a(i) = i Next i For i=3 To 6 b(i) = i Next i s1 = Factorial (A) s2 = Factorial (B) Print "s1="; s1; "s2="; s2 End Sub Function Factorial(a() As Integer) Dim t#, i% t=1 For i = LBound(A)To UBound(A) t = t * a(i) Next i Factorial = t End Function

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编写以下程序段： DIM I, J, K, A A=0 FOR I = 1 TO 3 FOR J = 1 TO I FOR K=-J TO 3 A=A+1 NEXT K NEXT J NEXT I 执行上面的三重循环后，变量A的值为( )。

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