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点击查看：2013年职称英语卫生类B级试题及答案汇总(基本完整版)
参考答案：
1、D. The majority of the world’s sugar now comes from this particular commercial species.
2、B. Unfortunately, however, the plant started to become weaker and more prone to disease.
3、A. Eventually, a commercial plant was developed which was 5 percent sweeter than before, but also much stronger and less likely to die from disease.
4、F. Since the 1960s, scientists have been analyzing the mysteries of the sugar cane’s genetic code.
5、C. One major gene has been identified by Dr Angelique D’Hont and her team in Montpelier, France.
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