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【简答题】
图中SLZA表示(), JXJ定位状态为()<吸起?落下>,自闭电路建立时,JXJ当下状态()<吸起?落下> 励磁电路中,SLZAJ线圈端子号()与KZ相连。 自闭电路中,SLZAJ线圈端子号()与KF-SLFJ-Q电源相连 KF-SLFJ-Q中,KF代表控制()<正?负>电源,Q表示()<前?后>接点,LJJ吸起时,该方向电源()<导通?不导通>,SLFJ吸起时,该方向电源()<导通?不导通>。
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举一反三
【单选题】She was very interested in the work of certain charities, and made a regular ______ to them.
A.
subscription
B.
contribution
C.
allowance
D.
tribute
【简答题】下列说法正确的是 A液体不能承受拉力，也不能承受压力； B液体不能承受拉力，但能承受压力； C液体能承受拉力，但不能承受压力； D液体能承受拉力，也能承受压力。
【单选题】Some students find certain grammar points and structures very difficult; _____, teachers need a reliable source of practice material to get these points across effectively. [ ]
A.
however
B.
as a result
C.
even so
D.
what’s more
【单选题】Philosophical problems arise when people ask questions that, though very , have certain characteristics in common.
A.
diverse
B.
relevant
C.
abstract
D.
consistent
【单选题】She was very interested in the work of certain charities, and made a regular _______ to them.
A.
tribe
B.
attribute
C.
contribution
D.
tribute
【单选题】The weather condition for a certain place or country will very likely vary every year.
A.
Y
B.
N
C.
NG
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