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问题 选择题

He hasn't slept at all for three days.________ he is tired out. [ ]

A. There is no point  

B. There is no need

C. It is no wonder  

D. It is no use

答案

答案：C

问答题 简答题

辐射照射的类别？
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单项选择题

设有如下程序：
Private Sub Command1_Click()
Dim sum As Double, x As Double
sum=0
n=0
For i=1 To 5
x=n/i
n=n+1
sum=sum+x
Next
End Sub
该程序通过For循环计算—个表达式的值，这个表达式是 ______。

A) 1+1/2+2/3+3/4+4/5
B) 1+1/2+2/3+3/4
C) 1/2+2/3+3/4+4/5
D) 1+1/2+1/3+1/4+1/5
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