A. the skies over Mozambique have been too busy B. malaria has risen sharply C. medical services have not been available D. medical staff is not enough 参考答案:B 答案解析:听懂关键句“The World Health Organization has warned that malaria has risen sharply after the flooding.”。
A. To outline contrasting types of economic systems. B. To explain the science of economics. C. To argue for the superiority of one economic system. D. To compare barter and money-exchange markets. 参考答案:A 答案解析:[参考译文]本文的主要目的是什么 [试题分析]本题考查对全文整体理解的能力。 [详细解答]从全文来看我们知道,文章首先指出了三种经济制度,然后对三种经济制度逐一进行了简要的概括,所以正确
第31题: [单项选择]实验室诊断低渗性脱水时,血钠值一般低于() A. 130mmol/L B. 135mmol/L C. 140mmol/L D. 145mmol/L E. 150mmol/L 参考答案:B 答案解析:低渗性脱水实验室检查,血清钠低于135mmol/L。尿比重低于1.010。尿钠、氯明显减少。