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搜题
【多选题】
报关行对航空货物的操作流程包括()
A.
接单、送单
B.
放行
C.
审单
D.
预录入
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举一反三
【单选题】设服从[0,1]上的均匀分布, 则( )。
A.
服从[ 1,1]上的均匀分布
B.
服从[0,1]上的均匀分布
C.
的密度函数
D.
在 上服从均匀分布
【单选题】测试放大电路输出电压幅值与相位的变化,可以得到它的频率响应,条件是
A.
输入电压幅值不变,改变频率
B.
输入电压频率不变,改变幅值
C.
输入电压的幅值与频率同时变化
D.
输入电压的幅值与频率都不变
【单选题】设X,Y相互独立且均服从[0,1]上的均匀分布,则服从区间或区域上的均匀分布的随机变量是( )
A.
(X,Y)
B.
X+Y
C.
D.
X-Y
【单选题】6 5.I'm pleased to tell you that the fax machines you ordered are ______ now.
A.
available
B.
convenient
C.
wonderful
D.
important
【单选题】I'm pleased to tell you that the machine you ordered are now.
A.
convenient
B.
wonderful
C.
available
D.
important
【单选题】I'm pleased to tell you that the fax machines you ordered are _______ now.
A.
available
B.
convenient
C.
wonderful
D.
important
【单选题】I'm pleased to tell you that the fax machines you ordered are _________.
A.
available
B.
wonderful
C.
convenient
D.
important
【单选题】I'm pleased to tell you that the fax machines you ordered are _______ now.
A.
available
B.
convenient
C.
wonderful
D.
important
【单选题】I'm pleased to tell you that the fax machines you ordered are ________ now.
A.
available
B.
convenient
C.
Wonderful
D.
important
【单选题】两等宽的圆柱体接触,其直径的d1=2d2,弹性模量E1=2E2,则其接触应力值为( )。
A.
σH1 = σH2
B.
σH1 =2 σH2
C.
σH1 =4 σH2
D.
σH1 =8 σH2
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