()主要以预防为主的质量和安全管理,从其基本内容看,无论是硬件改造还是软件管理都体现了预防为主的原则。
A、ISO9000
B、HACCP
C、GMP
D、NBA
参考答案:C
The teacher gave us so difficult a problem _____ we couldn't solve.
The teacher gave us so difficult a problem _____ we couldn't solve it. [ ]
A. as, that
B. that, as
C. which, that
D. the ones, which
各级河长要牵头组织对()等突出问题进行清理整治。
A.侵占河道
B.非法采砂
C.围垦湖泊
D.超标排放