第4题: [单项选择]慢性浅表性胃炎内镜的表现应为（） A. 可见圆形或椭圆形凹陷，周围有黏膜充血、水肿 B. 黏膜苍白或花斑状，黏膜萎缩变薄，皱襞变浅甚至消失，黏膜下血管透见 C. 黏膜肥厚、水肿，表现为皱襞粗大、似脑回状，充血不能展平，颜色深红 D. 黏膜充血、斑片状发红、黏膜水肿、反光增强、红白相间，发炎黏膜表面有较多透明或黄白色分泌物附着，难以冲掉 E. 凹陷周围黏膜皱襞呈放射状集中 参考答案:D
第20题: [单项选择]An intermediate spring is（）. A. fitted in each leg of the towing bridle B. generally located between the "fishplate" and the main towing hawser C. secured at the "H" bitts D. usually made of manila hawser 参考答案:B
第23题: [填空题]What is public good
It is one that a person can use without ______ the use of it for another person. 参考答案:reducing 答案解析:[解析] 本题是问什么是公共货物。根据第二段第一句A public good is one that a person can use without reducing the use of it
