①+②，得3x=3，
解，得x=1．
代入②，得1+y=3，
即y=2．
则原方程组的解为x=1y=2．
Don't say any more; we all believe the facts than your words. What you have explained doesn't make
_____. [ ]
A. sense
B. fun
C. use
D. meaning
男，21岁。左腰部外伤，有少量血尿及腰痛，血压80/50mmHg，脉搏110次/分，查体腰部可触及一压痛性肿块，可能为何种损伤
A．肾挫伤B．损伤性动脉阻塞C．重度肾损伤D．肾蒂断裂E．输尿管损伤
