题目内容：
[多选题,10分] 中国商品质量认证分为(()两种。A.安全认证
B.质量认证
C.合格认证
D.优化认证
参考答案：
选择题：[多选题,10分] 中国商品质量认证分为(()两种。
- 题目分类：郑州科技学院-工商企业管理-商品学
- 题目类型：选择题
- 查看权限：VIP
A.安全认证
B.质量认证
C.合格认证
D.优化认证
A.安全认证
B.质量认证
C.合格认证
D.优化认证
( )It’s difficult to find a _________ around here
( )It’s difficult to find a _________ around here in Beijing for less than 2000
若连续函数列的极限函数在区间I上不连续，则其函数列在区间I不一致收敛。(A)对(B)错
若连续函数列的极限函数在区间I上不连续，则其函数列在区间I不一致收敛。(A)对(B)错
-Do you still remember the accident? --- Yes, actu
-Do you still remember the accident? --- Yes, actually. I have experienced nothi
设A={a1b1 a2b1 a3b1,a1b2 a2b2 a3b2,a1b3 a2b3 a3b3},
设A={a1b1 a2b1 a3b1,a1b2 a2b2 a3b2,a1b3 a2b3 a3b3},其中ai≠0,bi≠0,i=1,2,3,则矩阵A的秩为()
( )According to the first story, the term “OK” ___
( )According to the first story, the term “OK” ___________.(本题2.0分) A、 was appro