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