下列关于丘疹的描述中,哪项不正确:
A.高出皮肤表面
B.局限性、坚实性突起
C.直径小于0.5cm
D.直径小于1.0cm
E.病变在表皮或真皮上部
参考答案:D
He tried his best to solve the problem,________ difficult it was.
A.however
B.no matter
C.whatever
D.although
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