汉武帝派__________________,__________________率兵大败匈奴,汉朝北部的边患基本解除。
卫青;霍去病
He spent too much time talking on ______ phone while we were all busy at _____ work.
A.the, 不填
B.a, 不填
C.不填, 不填
D.the, the
电气设备检修中更换的零部件,其技术性能应高于原设计的要求。()