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【简答题】
在初步了解用户需求的基础上,快速开发一个原型,根据用户的意见和评价对这个原型进行修改,如此反复,逐步完善,直到用户完全满意为止。采用这种开发系统的方法叫做 。
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【单选题】血液中有一种含铜的呈蓝色的蛋白质分子，其相对分子质量约为151000。已知该分子中铜的质量分数为0. 34%，则平均每个蛋白质分子中的铜原子数为 [ ]
A.
8
B.
6
C.
4
D.
2
【简答题】After the war,a new school building was put up ________there had once been a theater. 2. It was once a time________I had no interest in study and wanted to drop out of school. 3. ________________(educ...
【简答题】I wish I had more best friends! A. strongly agree B. agree C. neutral D. disagree E. strongly disagree
【简答题】Complete the following sentences
with the words below . Change the word forms if necessary. 1. I wish I had a more confident
____________. 2. Her
appearance had left on me an impression of high-born...
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