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【多选题】
以下哪些属于声学侦察设备的是 。A.
声响传感器
B.
声呐
C.
扩音器
D.
麦克风
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反馈参考答案：
举一反三
【单选题】可调进口导流叶片和整流叶片的防喘原理是：改变速度三角形的( )，使相对气流方向和设计状态下的方向趋于基本一致。
A.
空气绝对速度轴向的分速度大小
B.
空气牵连速度大小
C.
空气牵连速度方向
D.
空气绝对速度切向分量大小
【单选题】不断对网络进行干扰,改变系统正常的作业流程,执行无关程序影响正常用户的使用,这是黑客对网络的_________攻击手段( )
A.
非授权访问
B.
破坏数据完整性
C.
拒绝服务攻击
D.
信息泄露或丢失
【单选题】听力原文：M: Well, Donna, you look so happy. Any good news? W: No...Yes...I have a date tonight, but... M: Oh, that's really a celebration. W: Well. I've never done this before. I feel kind of silly, but h...
A.
Movies.
B.
Books.
C.
Politics.
D.
Music.
【简答题】My name is Lisa.I have a bird.She is white.So I call her Xiaobai.Xiaobai is only two years old.She’s not big.But she is beautiful and clever.She can speak. One day I go shopping with my sister Gina an...
【单选题】听力原文：M: Well, Donna, you look so happy. Any good news? W: No...Yes...I have a date tonight, but... M: Oh, that's really a celebration. W: Well. I've never done this before. I feel kind of silly, but h...
A.
To give up gambling right now.
B.
To work hard and win the heart of the boss.
C.
To have a good time and get relaxed.
D.
To study hard and read more.
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