第21题: [单项选择]原发综合征(). A. X线可见肺部原发灶、淋巴管炎及肺门淋巴结肿大 B. X线显示右锁骨上下片状、絮状阴影,边缘模糊,其内有薄壁空洞 C. X线显示双肺浓密细网状阴影,可见大小及密度大体相等的粟粒状阴影 D. 右肺上叶尖后段显示一厚壁空洞,双肺纹理增强,散在斑片状影,肺门被牵拉向上 E. 肺X线显示双肺肺组织广泛破坏,纤维组织增生伴胸膜肥厚,肺透过度增加,膈肌下移 参考答案:A
第27题: [单项选择]What was the Canadian economy like before this March in spite of the events of Sept. 11,2001 A. The Canadian economy was steady. B. The Canadian economy was affected greatly. C. The Canadian economy contracted by 0.2 percent. D. The Canadian economy was weak. 参考答案:A 答案解析:[试题分析] 判断推理题。
[详细解答] 从第一段的句子The April shrinkage was the first monthly decline since the events of S