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【单选题】
一般说来，串励、并励、复励磁方式的直流电动机中，机械特性最硬和最软的分别是___。A.
复励／并励
B.
并励/串励
C.
复励/串励
D.
串励／复励
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举一反三
【简答题】电池的发明人是 。
【单选题】The Greek ship drifted and the portside of a Chinese ship, which ____ the bull walk and Stanchions.
A.
had collision with
B.
was damaging
C.
w as causing damage to
D.
caused damage to
【简答题】如今，网络__________成为一个争夺人心与头脑的没有硝烟的战场。在这个战场上，各种思想、观念、文化__________，影响着民意人心，关乎社会与政治稳定。近年来发生的一系列事件都已证明了这一点。 依次填入划横线部分最恰当的一项是（ ）。
【单选题】The Greek ship drifted and struck the portside of a Chinese ship, which ___ the bulwalk and Stanchions.
A.
caused damage to
B.
had collision with
C.
was damaging
D.
was causing damage to
【单选题】Dr. Dorothy is ______.
A.
an environmental program manager of Greece
B.
a Greek official in charge of the construction
C.
a scholar opposing the construction of the sports complex
D.
a scholar in support of the Construction of the sports complex
【单选题】The Greek sip drifted and struck the portside of a Chinese ship,which________the Stanchion(支柱).
A.
caused damage to
B.
had collison with
C.
was damaging
D.
was causing damage to
【单选题】Dr. Dorothy is ______.
A.
an environmental program manager of Greece
B.
a Greek official in charge of the construction
C.
a scholar opposing the construction of the sports complex
D.
a scholar in support of the construction of the sports complex
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