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【单选题】
RS触发器74LS279中有两个触发器具有两个S输入端,它们的逻辑关系是( )。
A.
或
B.
与
C.
与非
D.
异或
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举一反三
【单选题】Which of the following best describes a controllable cost?
A.
A cost which can be easily forecast and is therefore readily controllable using budgetary control techniques
B.
A cost which can be specifically identified with a particular cost object
C.
cost which is easily controlled because it is not affected by fluctuations in the level of activity
D.
A cost which can be influenced by its budget holder
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【判断题】 井口高程基点的测量应按三等水准测量的精度要求测设。
A.
正确
B.
错误
查看完整题目与答案
【判断题】在中国语言由白话取代文言的关键时期，胡适既是一位语言革命家，又是一位杰出的建设者。()
A.
正确
B.
错误
查看完整题目与答案
【单选题】以下受自主神经支配的是
A.
口腔
B.
咽
C.
食管上端
D.
胃
E.
肛门外括约肌
查看完整题目与答案
【单选题】PS当中,钢笔路径闭合后转化为选区的快捷键是____。
A.
Ctrl+A
B.
Ctrl+Delete
C.
Ctrl+Shift
D.
Ctrl+Enter
查看完整题目与答案
【单选题】以下各项不受自主神经系支配的是
A.
泪腺分泌
B.
肛门括约肌收缩与松弛
C.
膀胱壁的收缩与松弛
D.
舌的运动
E.
唾液腺分泌唾液
查看完整题目与答案
【单选题】The ideal controllable switch has the following characteristics. Which is wrong? ( )
A.
Block arbitrarily large forward and reverse voltages with zero current flow when off.
B.
S witch from on to off or vice versa long-termly when triggered.
C.
C onduct arbitrarily large currents with zero voltage drop when on.
D.
V anishingly small power required from control source to trigger the switch.
查看完整题目与答案
【单选题】The alternating current generator supplying a load has a voltage drop resulted from the loadWhen the load has a lagging power factor this voltage drop （）.
A.
is small
B.
may be neglected
C.
is useful
D.
is considerable
查看完整题目与答案
【判断题】轻钢龙骨连接件有主副龙骨连接件、加长件、主吊件、副龙骨连接件
A.
正确
B.
错误
查看完整题目与答案
【单选题】As shown in following figure, a typical garden-variety red LED device will exhibit a drop of about 1.7 volts across its terminals. Note that this is not the same as the voltage drop across a resistor,...
A.
170 ohms
B.
500 ohms
C.
330 ohms
查看完整题目与答案
相关题目：
【单选题】Which of the following best describes a controllable cost?
A.
A cost which can be easily forecast and is therefore readily controllable using budgetary control techniques
B.
A cost which can be specifically identified with a particular cost object
C.
cost which is easily controlled because it is not affected by fluctuations in the level of activity
D.
A cost which can be influenced by its budget holder
查看完整题目与答案
【判断题】 井口高程基点的测量应按三等水准测量的精度要求测设。
A.
正确
B.
错误
查看完整题目与答案
【判断题】在中国语言由白话取代文言的关键时期，胡适既是一位语言革命家，又是一位杰出的建设者。()
A.
正确
B.
错误
查看完整题目与答案
【单选题】以下受自主神经支配的是
A.
口腔
B.
咽
C.
食管上端
D.
胃
E.
肛门外括约肌
查看完整题目与答案
【单选题】PS当中,钢笔路径闭合后转化为选区的快捷键是____。
A.
Ctrl+A
B.
Ctrl+Delete
C.
Ctrl+Shift
D.
Ctrl+Enter
查看完整题目与答案
【单选题】以下各项不受自主神经系支配的是
A.
泪腺分泌
B.
肛门括约肌收缩与松弛
C.
膀胱壁的收缩与松弛
D.
舌的运动
E.
唾液腺分泌唾液
查看完整题目与答案
【单选题】The ideal controllable switch has the following characteristics. Which is wrong? ( )
A.
Block arbitrarily large forward and reverse voltages with zero current flow when off.
B.
S witch from on to off or vice versa long-termly when triggered.
C.
C onduct arbitrarily large currents with zero voltage drop when on.
D.
V anishingly small power required from control source to trigger the switch.
查看完整题目与答案
【单选题】The alternating current generator supplying a load has a voltage drop resulted from the loadWhen the load has a lagging power factor this voltage drop （）.
A.
is small
B.
may be neglected
C.
is useful
D.
is considerable
查看完整题目与答案
【判断题】轻钢龙骨连接件有主副龙骨连接件、加长件、主吊件、副龙骨连接件
A.
正确
B.
错误
查看完整题目与答案
【单选题】As shown in following figure, a typical garden-variety red LED device will exhibit a drop of about 1.7 volts across its terminals. Note that this is not the same as the voltage drop across a resistor,...
A.
170 ohms
B.
500 ohms
C.
330 ohms
查看完整题目与答案