Agriculture is undoubtedly the most important
sector in the economies of most non-oil exporting African countries. It
{{U}} (62) {{/U}} about 30% of Africa’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 in Africa is {{U}} (69) {{/U}} tropical in nature, which is broadly {{U}} (70) {{/U}} into three main climatic zones: {{U}} (71) {{/U}} equatori A. Since B. Even C. Though D. If [单项选择]女性,60岁。反复咳嗽、咳痰10余年,每年冬季发作3个月以上。查体:桶状胸,双肺叩诊过清音,呼气音延长。其诊断可能为()
A. 肺结核 B. 肺脓肿 C. 慢性支气管炎并肺气肿 D. 支气管哮喘 E. 支气管肺癌 [单选题]当公共场所发生火灾时,该公共场所的( )人员有组织、引导在场群众疏散的义务。
A.法人 B.现场工作 C.安全保卫 D.领导 [单选题]急性心力衰竭急救时的给氧流量为:( )
A.1~2L/min B. 2~4L/min C. 4~6L/min D. 6~8L/min [多选题]作业票审核人的安全责任描述正确的是( )。
A.审核作业风险识别准确性 B.审核作业安全措施及危险点控制措施是否正确、完备 C.审核施工作业的方法和步骤是否正确、完备 D.督促并协助施工负责人进行安全技术交底 E./ F./ G./ H./ [单项选择]肥达反应中,若“O”正常而“H”高,可能是()
A. 有过伤寒病史 B. 以上都不对 C. 感染早期 D. 交叉反应 E. 其他沙门菌感染 [判断题]单程票指由TVM/MVM或者错误OM出售,可在轨道交通网络中按赋值乘坐使用一次。进站条件是当日任意站,使用方式是“照进插出”。改正:本站
A.正确 B.错误 [单选题]旋启式止回阀的阀瓣呈( )。
A.圆球状 B.蝶片状 C.圆盘状 D.塞型 [填空题]发电厂采用中性点非直接接地或不接地系统,提高厂用电系统的( )。
[单选题]限制价格是政府为了限制某些生活必需品的物价上涨而规定的这些产品的( )。
A.最低价格 B.最高价格 C.浮动价格 D.均衡价格 我来回答: 提交
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