In the l960s，scientists working in Barbodos looked for ways to make the commercial species stronger and more able to resist disease．They experimented with breeding programmes，mixing genes from the more delicate，commercial type． (48) This sugar cane is not yet ready to be sold commercially，but when this happens，it is expected to be incredible profitable for the industry．

(49)Brazil，which produces one quarter of the worlds sugar，has coordinated all international project under Professor Paulo Arrudo of the Universidade Estaudual de Campinas in Sao Paulo．Teams of experts have worked with him to discover more about which parts of the genetic structure of the plant are important for the production of sugar and its overall health.

Despite all the research，however，we still do not fully understand how the genes in sugar cane．(50) This gene is particularly exciting because it makes the plant resistant to rust，a disease which probably originated in India，but is IIOW capable of infecting sugar cane across the world.Scientist believes they will eventually be able to grow a plant which cannot be destroyed by rust．

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．

B．One major gene has been identified by Dr．Angelique DHont and her team in Montpelier，France．

C．Sugar cane is now much more vigorous and the supply of sugar is therefore moreguaranteed．

【2013年职称英语考试《卫生类B级》考试真题】相关文章：

★ 2012年职称英语卫生类A级考试真题——概括大意

★ 2012年职称英语卫生类A级考试真题——完形填空

★ 2013年职称英语考试《卫生类A级》考试真题答案解析

★ 职称英语考题2010年卫生B类阅读判断

★ 2010职称英语考题卫生A级真题：词汇选项

★ 2014年职称英语考试《卫生类A级》考试真题及答案

★ 职称英语考题2010年卫生B类词汇选项

★ 2007全国职称英语考试题库卫生类B：阅读判断

★ 2012年职称英语卫生类A级考试真题——阅读理解

★ 职称英语试题库2011卫生类A级：词汇选项