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【单选题】
能促进γ - 氨基丁酸生成的维生素是
A.
维生素 B 6
B.
维生素 PP
C.
维生素 B 1
D.
维生素 B 2
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【单选题】一般认为ω-3与ω-6脂肪酸摄入比以( )最为适宜。
A.
1:(4~6)
B.
1:1
C.
1:2
D.
1:8
E.
1:10
【单选题】— ______ did you come to school this morning? —In my mother’s car. [     ]
A.
When
B.
Why
C.
Who
D.
How
【单选题】组合逻辑电路输出状态的改变( )。
A.
仅与该时刻输入信号的状态有关
B.
仅与电路的原状态有关
C.
与A、B皆有关
D.
与A、B皆无关
【单选题】Why did you stop my car, police officer? ()You just ran a red light.
A.
Your driver's license please.
B.
I just want to.
C.
No why.
【判断题】安装是指生产设备、动力设备、起重设备、运输设备、传动设备、医疗实验设备及其他各种设备的安装、安置工程作业。()
A.
正确
B.
错误
【单选题】Man: Whoops! Did any of my coffee just spill on you?Woman: Ouch! It's hot! Is that all you have to say?Question: What does the woman imply?
A.
She doesn't like to drink coffee.
B.
She's not upset by the accident.
C.
The man should apologize.
D.
The man has spilled coffee on her before.
【简答题】—Do you mind if I use the phone? — A.Why not? B.That’s all right. C.Come on! D.Be my guest!
【单选题】若保持二阶系统的 ζ 不变,提高 ω n ,则可
A.
提高上升时间和峰值时间
B.
减少上升时间和峰值时间
C.
提高上升时间和调整时间
D.
减少上升时间和超调量
【单选题】. -Why did you have to get that stamp? It’s far from beautiful. -________my collection,of course.
A.
Completing
B.
To complete
C.
Complete
D.
Completed
【简答题】在组合逻辑电路中,当输入信号改变状态时,输出端可能出现瞬间干扰窄脉冲的现象称为 。
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