系统性红斑狼疮的特异性表现为()
A.颊部蝶形皮疹及蛋白尿
B.腕、掌指、近指关节受累
C.膝关节受累
D.第一趾较剧烈疼痛
E.大量龋齿提示
参考答案:A
The book __ by him is difficult __.
A.wrote; understanding
B.written; to be understood
C.writing; understand
D.written; to understand
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