实现旅游经济结构优化的主要途径不包括( )。
A:不断创新经济管理体制，创造多种所有制并存融合良好发展的政策环境 B:不断更新法律法规，为实现旅游经济结构优化提供有力保障 C:不断引进先进科技与管理技术，奠定旅游企业集团化发展的坚实基础 D:不断推进区域间合作与交流，创造各地区和谐发展的新空间
Multivitamins Urged for All Pregnant Women
A recent study in Tanzaniafound that when pregnant women took vitamins every day, fewer babies were bom too small. Babies that weigh less than two and one-half kilograms at birth have a greater risk of dying. Those that survive are more likely to experience problems with their development. And experts say that as adults they have a higher risk of diseases including heart disease and diabetes. The World Health Organization1 estimates that every year twenty million babies are bom with low birth weight. Nine out of ten of them are bom in developing countries.
The new study took place inDar es Salaam. 4,200 pregnant women received multivitamins. The pills contained all of the vitamins in the B group along with2 vitamins C and E. They also contained several times more iron and folate than the levels advised for women in developed nations. Pregnant women especially in poor countries may find it difficult to get enough vitamins and minerals from the foods in their diet.
The scientists compared the findings with results from a group of 4,000 women who did not receive the vitamins. A report by the scientists, from theUnited StatesandTanzania, appeared in the New England Journal of Medicine,3 Wafaie Fawzi of the Harvard University School of Public Health4 led the study. None of the women in the study had HTV, the virus that causes AIDS. The scientists reported earlier that daily multivitamins were a low-cost way to reduce fetal deaths in pregnant women infected with 5HIV. The earlier work inTanzaniaalso found improvement in the mothers in their number of blood cells known as lymphocytes. Lymphocytes increase the body’s immunity against infection.
The new study in pregnant women who were not infected with the AIDS virus found that multivitamins reduced the risk of low birth weight. Just under eight percent of the babies bom to women who took the multivitamins weighed less than 2,500 grams. The rate was almost nine and one-half percent in the group of women who received a placebo, an inactive pill, instead of the vitamins. But the vitamins did not do much to reduce the rates of babies being bom too early or dying while still a fetus. Still, the researchers say multivitamins should be considered for all pregnant women in developing countries.
词汇
multivitamin/,mʌlti"vitəmin/ n.多种维生素制剂
urge /"ɜːdʒ/ v.他极力主张;强烈要求;敦促
pregnant /"pregnənt/ adj.怀孕的,妊娠的
Tanzania /,tænzə"niə; ,tɑ:nzɑ:"ni:ɑ:/ n.坦桑尼亚（非洲国家）
diabetes/,daɪə"biːtiːz/ n.糖尿病,多尿症
Dar es Salaam /"dɑ:r,essə"lɑ:m/ n.达累斯萨拉姆（坦桑尼亚首都)
folate /"fəʊleɪt/ n.叶酸盐
mineral/ ˈmɪnərəl/n.矿物; 矿石; 矿物质; 汽水; adj.矿物的，似矿物的;
fetal["fi:tl] adj.胎儿的，胎的;
lymphocyte[ˈlɪmfəsaɪt] n.淋巴细胞;
immunity[ɪ"mju:nətɪ] n.免疫力,免疫性
infection[ɪn"fekʃn] n.传染，感染; 传染病
placebo[plə"si:bəʊ] n.安慰剂;
inactive[ɪnˈæktɪv] adj.无作用的
pill[pɪl] n.药丸; 丸剂
fetus["fi:təs] n.胎，胎儿;
注释：
1.World Health Organization (WHO):世界卫生组织
2.along with：与……一起
3.New England Journal of Medicine:《新英格兰医学杂志》。New England是美国东北六州(Maine, Vermont, New Hampshire, Massachusetts, Rhode Island 和Connecticut)的总称。
4.Harvard University School of Public Health:哈佛大学公共卫生学院
5.(be)infected with:感染上What a role do lymphocytes play in the human body?
A:To reduce the rate of dying while still a fetus B:To raise the body’s immunity against infection C:To help prevent the development of heart disease D:To help prevent the development of diabetes
经济结构优化和经济总量平衡的关系是（ ）。
A:经济结构优化是经济总量平衡的基础 B:经济结构优化是经济总量平衡的目标 C:二者没有必然联系 D:相互联系，彼此制约
我国经济结构调整和优化的基本要求是（）。
A:巩固和加强农业基础地位 B:加快工业改组改造和结构优化升级 C:大力发展服务业，特别要把科技、教育放在突出位置 D:加快国民经济和社会信息化，继续加强基础设施建设
实现旅游经济结构优化的主要途径不包括( )。
A:不断创新经济管理体制，创造多种所有制并存融合良好发展的政策环境 B:不断更新法律法规，为实现旅游经济结构优化提供有力保障 C:不断引进先进科技与管理技术，奠定旅游企业集团化发展的坚实基础 D:不断推进区域间合作与交流，创造各地区和谐发展的新空间
我国经济结构调整和优化的基本要求是
A:巩固和加强农业基础地位，加快工业改组改造和结构优化升级 B:大力发展服务业，特别要把科技、教育放在突出位置 C:加快国民经济和社会信息化 D:继续加强基础设施建设
我国经济结构调整和优化的基本要求是
A:巩固和加强农业基础地位，加快工业改组改造和结构优化升级 B:大力发展服务业，特别要把科技、教育放在突出位置 C:加快国民经济和社会信息化 D:继续加强基础设施建设
形势与政策
