对称性眼睑、眼眶周围紫红色斑疹见于哪种疾病（）
A.系统性红斑狼疮
B.类风湿关节炎
C.皮肌炎
D.日光性皮炎
E.结膜炎
参考答案：C
—Look! A book is on the floor. Whose is it?
—It ______be Rick's. It has his name on it.
A．mustn't
B．can't
C．must
D．need
试述创伤的急救措施。
