A. it difficult for them to finish the job in time B. difficult for them to finish the job in time C. they have much difficulty to finish the job in time D. that difficult for them to finish the job in time
A. 豆薯 B. 黄瓜 C. 莴苣 D. 菜豆
A. 投资项目的有效年限 B. 投资项目的现金流量 C. 企业要求的最低投资报酬率 D. 银行贷款利率
A. 外形修复机 B. 垫铁 C. 钣金锤
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