第18题: [单项选择]关于贲门失弛缓症的X线表现中哪一项是错误的?() A. 贲门管的功能性狭窄和食管的高度扩张同时存在 B. 食管下端逐渐变细呈纺锤状,或鸟嘴状进入膈下 C. 呈环形对称性狭窄,其内可见纤细黏膜皱襞 D. 食管狭窄不对称,内壁不规则,不随呼吸改变 E. 食管极度扩张,形成巨大囊袋,横卧膈上 参考答案:D
A. which centers on America and Africa B. which was named by an American C. which kills many people every time D. which has side-effects all over the world 参考答案:D 答案解析:细节题。 [定位] 根据warm ocean current 联系huge increase in ocean temperatures,定位于原文第一段最后两句。 [解析] 第一段倒数第