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A journy to Hong Kong Disneyland Last summer vacation, I had my first and unforgettable travel eperience at Hong Kong Disneyland. Before we left,we prepared everthing for the trip. No matter how well you prepare, sometimes thing still go wrong.When we arrived at the airport,we discovered that we had left our Disneyland admission ticket coupons at home! Father said we were lucky not to leave our visas at home.Otherwise, we would have had to go back home. Acccidents will happen, and the first night we were unlucky enough to experience an electrical fire at the hotel.Luckily it was put out in time,but we found it difficult to fall asleep again. The next day we were determined to have fun.Our day in Disneyland was amazing and memorable.We took photos with Disneyland characters,watched a parade and rode the exciting roller coaster, screaming and laughing during the whole ride.We also bought some souvenirs to take back home,such as cartoon toys and key rings. When you travel you won’t always have the same experience.Sometimes your journey will go smoothly; other times you’ll face problems.What you have to remember is not wheher it is good or bad.Just accept it and learn from it.Don’ let a bad experience ruin your holiday.
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【单选题】若4位倒T形电阻网络D/A转换器,输入数字量0001时对应的输出电压为0.1V,则输出电压为0.6 V时,输入数字量应为( )。
A.
0011
B.
1010
C.
1001
D.
0110
【单选题】在学习历史的时候,头脑中就会构想出种种历史场景:,这体现了哪种类型的想象?
A.
再造性想象
B.
创造性想象
C.
憧憬性想象
D.
无意想象
【单选题】4 位倒 T 形电阻网络 DAC 的电阻网络的电阻取值有( )种。
A.
1
B.
2
C.
4
D.
8
【单选题】若 4 位倒 T 形电阻网络 D/A 转换器,输入数字量 0010 时对应的输出电压为 0.2V ,则输入数字量为 1010 时,输出电压应为( )。
A.
0.1V
B.
0.5V
C.
1V
D.
2V
【单选题】若 4 位倒 T 形电阻网络 D/A 转换器,输入数字量 0001 时对应的输出电压为 0.1V ,则输出电压为 1.2 V 时,输入数字量应为 ( ) 。
A.
1001
B.
1010
C.
1011
D.
1100
【单选题】4位倒T形电阻网络D/A转换器从低位到高位的输入电阻上的电流分别为()
A.
I、2I、8I、16I
B.
I、2I、4I、8I
C.
I/16、I/8、I/4、I/2
D.
I/2、I/4、I/8、I/16
【单选题】在下图所示的4位倒T形电阻网络D/A转换器中,Rf=R,VREF=20V,试分析当D3D2D1D0取0010时,输出电压VO的值? 【图片】
A.
-2.5V
B.
-10V
C.
-5V
D.
-1.25
【单选题】若 4 位倒 T 形电阻网络 D/A 转换器,输入数字量 0100 时对应的输出电压为 0.8V ,则输出电压为 2V 时,输入数字量应为 ( ) 。
A.
1001
B.
1010
C.
1011
D.
1100
【简答题】在如图8.1.2所示4位倒T形电阻网络D/A转换器中,已知VREF1=10 V,R=10 kΩ;当D3D2D1D0=1111时[*]则运放的反馈电阻Rf为________________V kΩ。 [*]
【单选题】4 位 倒 T 形电阻网络 D/A 转换电路中,已知 V REF =- 8 V , 当 d 3 d 2 d 1 d 0 =1000 时 ,在输出端所产生的模拟电压值 为
A.
-4V
B.
4V
C.
-2V
D.
2V
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