Please pass me the book _____ cover is black. [ ]
A. of which
B. that
C. whose
D. Its
答案:C
风湿热最常见的皮肤表现是
A.猩红热样皮疹
B.荨麻疹
C.结节性红斑
D.多型红斑
E.皮下小结
疾病的诊断和治疗方法,不得申请专利保护。