四六级考试

解析：Agriculture is undoubtedly th

来源:网考网四六级 所有评论

【单选题】

Agriculture is undoubtedly the most important sector in the economies of most non-oil exportingAfrican countries. It {{U}} (62) {{/U}} about 30% ofAfrica’s GDP and contributes {{U}} (63) {{/U}} 50% of the total export value, {{U}} (64) {{/U}} 70% of the continent’s population depending on the sector for their {{U}} (65) {{/U}}. Production is subsistence in nature with a high {{U}} (66) {{/U}} on the rain. The debate on climate change and its impacts on agriculture is {{U}} (67) {{/U}} very crucial to the very survival of the continent and its people. The continent is particularly {{U}} (68) {{/U}} to climate change because it includes some of the world’s poorest nations.
The climate inAfrica is {{U}} (69) {{/U}} tropical in nature, which is broadly {{U}} (70) {{/U}} into three main climatic zones: {{U}} (71) {{/U}} equatorial, dry, and temperate(温带). Within these zones, altitude and other localized {{U}} (72) {{/U}} also produce distinctive regional climates.
Climate change, {{U}} (73) {{/U}} indicated by prolonged drought is one of the most serious climatic {{U}} (74) {{/U}} affecting the agricultural sector of the continent.As most of the agriculture activities inAfrican countries hinges on rain fed, any adverse changes in the climate would likely have a {{U}} (75) {{/U}} effect on the sector in the region.
{{U}} (76) {{/U}} changes in the climate may affect the whole continent, its {{U}} (77) {{/U}} may vary across the continent. In northeastAfrica, more intense dry periods and shorter wet seasons are expected to affect even huge river systems such as theBlue Nile, leading to serious water shortages and {{U}} (78) {{/U}} consequences to the agriculture and forestry sectors throughout the region.East andCentralAfrica will also see its agricultural {{U}} (79) {{/U}} decline.Coastal areas may also be affected by rising sea levels and intrusion of salt water into inland freshwater resources. The staple food for the region, maize, is particularly susceptible to drought. Wetlands of international importance and wildlife are also under threat from {{U}} (80) {{/U}} in SouthernAfricA、Climate change, therefore, is expected to worsen the food supply, {{U}}(81) {{/U}}, exacerbate the widespread poverty in the region.
A．sure
B．much
C．such
D．therefore

网考网参考答案：D
网考网解析：
[一步到位] 副词辨义题．本处意思是：关于气候变化及其对农业影响的争论因此对于非洲大陆及其人民的生存至关重要。本句与上文是因果关系．故选therefore。 [深度点拔] A sure太过绝对，上下文中没有提示；B much 不用来修饰very；C such是形容词，“如此，这样的”不能用来修饰副词very。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>

相关推荐

发布评论 查看全部评论