皮皮学，免费搜题
登录
搜题
【单选题】
右图电路，A为8421BCD码十进制加法计数器，B为4位D/A转换器。已知计数器的初态为0000，D/A转换器输入0000～1111所对应的输出电压范围为0 ~ 4.5V，问第15个CP脉冲作用后U0 =( )。【图片】A.
0V
B.
1.5V
C.
3.0V
D.
4.5V
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【判断题】) Production under increasing opportunity costs can result from the two industries using factors of production in different combinations.
A.
正确
B.
错误
【单选题】Different from fish, dolphins______.
A.
live on land
B.
breathe with lungs
C.
breathe under water
D.
live without oxygen
【简答题】怎么理解自然规律与社会规律的联系与区别?
【单选题】How is the European university system different from the American one?
A.
Professors are not so highly respected as they desire.
B.
Students are not under much academic pressure.
C.
Libraries are open mainly for independent study.
D.
Examinations are replaced by quizzes and paper-writing.
【简答题】Different from her siblings, Mary I was ____. Under her reign, many Protestants was persecuted and Mary was described as ____.
【判断题】Under GAAP, the declaration of a property dividend may require the recognition of a gain or loss if the fair value of the property is different from its book value on the declaration date.
A.
正确
B.
错误
相关题目：
参考解析：
知识点：
题目纠错 0
发布
