溃疡急性穿孔最有诊断意义的是()。
A.突发剧烈腹痛
B.出现腹膜炎体征
C.肠鸣音减弱或消失
D.肝浊音界减弱或消失
E.腹部X线示膈下有游离气体
参考答案:E
根据首字母及汉语提示,完成下列单词的拼写,使句意明确,语言通顺。
1. It is i_________ (重要的) for you to keep healthy.
2. He r_________ (收到了) a story-book on his last birthday.
3. We shouldn't throw rubbish e_________ (到处) to protect environment.
4. A_______ (四月) is the fourth month of a year.
5. "Help y_________ (自便) to some fish." Mum said to my friends.
雷尼替丁的结构类型属于
A.咪唑类 B.噻唑类C.哌啶类 D.吡啶类E.呋喃类