商品如果出现在“商品处罚”中该如何处理?
参考答案:
根据失败原因重新编辑再提交
Tom wanted to buy a new computer, but he couldn’t _____ it.[ ]
A. buy
B. pay for
C. afford
D. spend
评价调节系统动态特性的质量指标有哪些?