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【多选题】
普萘洛尔用于治疗A.
心律失常
B.
高血压
C.
心绞痛
D.
糖尿病
E.
甲状腺功能亢进
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举一反三
【单选题】The switchboards for AC systems differ from the DC switchgear in that the open type panels are generally and the dead-front switchgear is the common rule.
A.
permissibly
B.
permissible
C.
no permissible
D.
not permissible
【简答题】请写出以下题目的运算结果: 1 、二进制数运算规则 0 +0= 0+1= 1+0= 1+1=
【单选题】The OCR is one of the most important protective relaying devices in the main switchboards, the correct statement below about it is: ______.
A.
the over current relay only can carry out overload protection
B.
it only can carry out short circuit protection
C.
it is for low-voltage protection
D.
nowadays it is usually of electronic type
【简答题】请写出以下题目的运算结果: 1 、二进制数运算规则 0 -0= 0-1= 1-0= 1-1=
【单选题】The switchboards for AC systems differ from the DC switch gear in that the open type panels are generally __________and the dead-front gear is the common rule.
A.
permissibly
B.
no permissible
C.
permissible
D.
not permissible
【单选题】The switchboards for a.csystems differ from the d.cswitch gear in that the open type panels are generally_____ and the dead-front switch gear is the common rule.
A.
permissibly
B.
permissible
C.
no permissible
D.
not permissible
【单选题】二进制数加法运算的基本特点是“逢二进一”，即0+0=0 ，0+1=1 ，1+0=1 ，1+1=0 并进位。运用这一基本法则和十进制运算的类似规律， 得出二进制数加法运算1001+101 的结果为
A.
1001
B.
1010
C.
1110
D.
1101
【单选题】In addition to a display device, such as a monitor, a computer display system also requires graphics ____ that generates the signals for displaying an image on the screen.
A.
ports
B.
switchboards
C.
circuitry
D.
algorithms
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