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