创伤性关节炎与急性痛风性关节炎的区别是()
A.血尿酸正常
B.有外伤史
C.可见于任何年龄
D.无关节变形
E.关节疼痛呈间断性
参考答案:A, B, C, D, E
The panic buying of salt reminds us that it is necessary to keep _____ in an emergency. [ ]
A. quiet
B. calm
C. silent
D. still
密目式安全网只能用于立网防护。()