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- 1They ensured the old lady that her son ___ back in a few days,but she was still very worried.(come)
- 2Millions of people are .
- 3基尔霍夫定律里的方向问题
- 4With the d____ of computer technology,computer have become more and more popular.
- 5（2ab平方c负三次方）负二次方÷（a负二次方b）三次方=多少呢 大家帮我算算
- 6化简；6倍根号3分之1减根号12 求解!.
- 7what are you going to do about the thing 改病句
- 8已知PA⊥平面ABC，垂足为A，∠ABC=120°，PA=AB=BC=6，则PC=_．
- 9正数加负数,等于加负数的补码,2-6=-4.2为0010,-6的补码为1010,相加得1110,这个数不上-6么?
- 10请填上said或told,并用括号中动词的正确时态填空 He () he () (cannot) understand me.