When she arrived, I felt bored and disappointed, because I____________ since seven o’clock.
A. had waited
B. had been waiting
C. were waiting
D. have been waited
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When we moved to France, the children _____ themselves to the new surrounding very well.
A. adapted
B. brought
C. were waiting
D. have been waited
A soldier should never ________ from the duty of defending his country even in the face of
A. shrink
B. shield
C. shelter
D. avoid
铝芯电力电缆截面不宜小于()。
A. 1.5mm??2
B. 2.5mm??2
C. 4mm??2
D. 6mm??2
耐热铝合金线导线NAHLGJQ—1440长期允许载流量约为()。
A. 1500
B. 1800
C. 2000
D. 2800