两个数之差为13,之和为41,请问两个数的平方差等于多少( )
A.533
B.-533
C.±533
D.±473
参考答案:C
—What are you doing?
—I'm ________ my bag, but I can't ________ it. [ ]
A. looking for, look for
B. looking for, find
C. finding, look for
D. finding, find
女性,20岁,主诉蛋白尿,关节痛,精神障碍,并伴有胸腔积液,应考虑诊断为 ()
A.肾小球肾炎
B.肾病综合征
C.精神分裂症
D.系统性红斑狼疮
E.类风湿关节炎