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【判断题】
等效电源的内阻就是有源二端网络中所有电源均除去(理想电压源短路,理想电流源开路)后所得到的无源二端网络的等效电阻。A.
正确
B.
错误
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举一反三
【简答题】He expressed concern that the ship might be in distress.
【单选题】He expressed his ______ opinion at the meeting.
A.
single
B.
personal
C.
person
D.
private
【判断题】在检修工作地点，最多只许有两个氧气瓶：一个工作，一个备用。使用中的氧气瓶和乙炔气瓶应垂直放置并固定起来，每一气瓶上应套有厚度不少于25mm的防震胶圈两个。氧气瓶和乙炔气瓶的距离不得小于8m。氧气瓶和乙炔瓶到焊接作业点火源的距离不应小于10m。严禁使用没有减压器的氧气瓶。严禁使用没有减压器和回火防止器的溶解乙炔气瓶。
A.
正确
B.
错误
【简答题】克服人际交往中的心理障碍的方法有哪些?
【单选题】He expressed his hope ____ he would visit China again the next year, and this was the very hope ____ he expressed as soon as he arrived in the country.
A.
that; that
B.
which; which
C.
that; which
D.
which; that
【单选题】He expressed a hope _______ he would visit China again the next year, and this was the very hope ________ he would express as soon as he arrived in the country.
A.
that; that
B.
which; which
C.
that; which
D.
which; that
【单选题】He expressed his hope ____ he would visit Chinaagain thenext year, and this was The very hope____he expressed as soon as he arrived in the country.
A.
that;that
B.
which;which
C.
that;which
D.
which;that
【单选题】He expressed his hope _____ he would visit Beijing again the next year, and this was the very hope _____ he expressed as soon as he arrived in the city. [ ]
A.
that; that
B.
which; which
C.
that; which
D.
which; that
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