第4题: [单项选择]配制危险药物,为防止药瓶和注射器内压与大气压相差太远,可选用() A. 带0.2μm疏水滤器和0.5μm滤器的针头 B. 带0.2μm疏水滤器和2μm滤器的针头 C. 带0.2μm疏水滤器和5μm滤器的针头 D. 带0.5μm疏水滤器和2μm滤器的针头 E. 带0.5μm疏水滤器和5μm滤器的针头 参考答案:C
第23题: [单项选择]Which of the following is NOT true of the World Summit on Food Security A. It was held in Rome. B. It lasted for three days. C. It produced limited measures. D. It aimed to fight rising anger. 参考答案:D 答案解析:[听力原文] Last week the United Nations held a World Summit on Food Security. But the three- day