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【判断题】
接触网支柱按其用途可分为中间柱、转换柱、中心柱、锚柱、定位柱、软横跨柱、硬横梁和桥梁柱等。（）A.
正确
B.
错误
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【简答题】One fine winter day some ants were working in the field. They were very busy. Just then a grasshopper(蚱蜢)passed by.' Good day, kind ants（蚂蚁）,' said the grasshopper. 'I am very hungry. Won't you lend m...
【简答题】－－－You ____ him more help, even though you were very busy.－－－Well, now I regret not.A．might have25. ---You ____ him more help, even though you were very busy. ---Well, now I regret not. A．might have g...
【简答题】任务型阅读 。 One fine winter day some ants were working in the field. They were very busy. Just then a grasshopper (蚱蜢) passed by. 'Good day, kind ants,' said the grasshopper. 'I am very hungry. Won't you ...
【简答题】功率因数由 和 两个因素共同决定。输入电流总畸变率 THD 越小, PF 越 大 。
【单选题】If it were not for the fact that I _____ very busy,I would go with you. [ ]
A.
am
B.
was
C.
were
D.
should be
【单选题】You ______ her more help, even though you were really very busy.
A.
ought to have given
B.
must have given
C.
might give
D.
ought to give
【单选题】You______him ont though you were very busy.
A.
should have helped
B.
must help
C.
ought to help
D.
could have helped
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