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【单选题】
设集合 A ={ x | x < 3} ,下列元素中不属于集合 A 的是( )A.
－ 1
B.
2
C.
0
D.
3
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反馈参考答案：
举一反三
【单选题】We've asked the neighbours to the house for us while we're away. [ ]
A.
have an eye for
B.
keep an eye on
C.
keep an eye open
D.
keep eye on
【单选题】下列属性中,能表示窗体执行时以正常窗口状态显示的属性是( )。
A.
TabIndex
B.
ControlBox
C.
BorderStyle
D.
WindowsState
【单选题】We need to ________an eye on all the activities to make sure that people stay safe.
A.
catch
B.
take
C.
keep
D.
bring
【单选题】What we need to do is to enjoy the relationship and at the same time to keep an eye open.
A.
Y
B.
N
C.
NG
【单选题】We need to an eye on all activities to make sure that people stay safe.
A.
catch
B.
keep
C.
take
D.
bring
【单选题】We need to ________an eye on all the activities to make sure that people stay safe.
A.
catch
B.
keep
C.
take
【单选题】We need to ________an eye on all the activities to make sure that people stay safe.
A.
catch
B.
keep
C.
take
D.
bring
【简答题】防火墙的主要功能有哪些?
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