题目内容：
测定前用溶剂空白校正的测定方法是参考答案：
答案解析：
单选题：测定前用溶剂空白校正的测定方法是
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- 题目类型：单选题
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某工程合同总收入8000万元，本期工程进度为60%，上年工程进度30%，本期实际收到3000万元，按完工百分比法计算本期
某工程合同总收入8000万元，本期工程进度为60%，上年工程进度30%，本期实际收到3000万元，按完工百分比法计算本期的合同收入是（ ）万元A．2400 B
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点击开始播放听力音频mp3:{MP3:http://wximg.233.com/attached/media/20130805/2013080510521211
What did he order during his last flight?
What did he order during his last flight?A．Some cigarettes. B．A special salad. C
When will the man go on the trip?
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