JJG是（）的符号。
A．计量检定规程
B．计量校准规范
C．测试标准
D．检测规范
参考答案：A
_____ coins is my hobby, because they are interesting. And I like them very much. [ ]
A. Collect
B. To collect
C. Collecting of
D. Collecting
肾梗死（）
A.液化性坏死
B.凝固性坏死
C.气性坏疽
D.湿性坏疽
