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【单选题】
In an R/2R DAC, there are在R/2R的数模转换器中，包含A.
four values of resistors. 4种阻值的电阻。
B.
one resistor value . 1种阻值的电阻。
C.
two resistor values . 2种阻值的电阻。
D.
a number of resistor values equal to the number of inputs . 跟输入端个数相同种阻值的电阻。
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举一反三
【多选题】支气管哮喘的体征
A.
典型的体征为双肺可闻及广泛的哮鸣音，呼气相延长
B.
严重的哮喘，表现为“寂静肺”，也叫“沉默肺”
C.
双肺可闻及湿啰音
D.
双肺可闻及Velcro
【多选题】下列各项中,关于记账凭证的说法正确的有( )。
A.
收款凭证和付款凭证是根据库存现金和银行存款收支业务的原始凭证填制
B.
收款凭证和付款凭证是登记库存现金日记账和银行存款日记账的依据
C.
收款凭证和付款凭证可以作为登记明细分类账的依据，但不能作为登记总分类账的依据
D.
不涉及收款和付款业务的应填制转账凭证
【简答题】The first time I saw Carlos I would never have believed he was going to change my life. I had my arms full of books and I was tearing into the classroom when I ran into something solid. It was Carlos....
【单选题】I wasn’t complaining. I expressed my surprise because I had never seen this happen in that case before.
A.
mostly
B.
rarely
C.
nearly
D.
merely
【简答题】The first time I saw Carlos I would never have believed he was going to change my life．I had my arms full of books and I was rushing into the classroom when 1 ran into something solid. It was Carlos. ...
【简答题】B The first time I saw Carlos I would never have believed he was going to change my life. I had my arms full of books and I was tearing into the classroom when I ran into something solid. It was Carlo...
【简答题】The first time I saw Carlos I would never have believed he was going to change my life. I had my arms full of books and I was tearing into the classroom when 1 ran into something solid. It was Carlos....
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