直线2x-y=0与圆C：（x-2）2+（y+1）2=9交于AB两点，则ΔABC（C为圆心）的面积等于（ ）。
2
Here are the first three books of his poem works, with the fourth one to _____ next month.
A．come out
B．publish
C．replace
D．work out
结石阻塞输尿管引起尿量减少的机制是
A．肾小球毛细血管血压降低B．囊内压升高C．血浆胶体渗透压降低D．血浆晶体渗透压降低E．肾小管内溶质浓度增加
