学术会议报告的一般步骤包括什么()
A.开场白
B.导言
C.内容
D.致谢
参考答案:A, B, C, D
These story books for children are awfully written. They are _____ interesting _____ exciting. [ ]
A. either; or
B. neither; nor
C. both; and
D. not only; but also
低渗性缺水常见于:()
A.急性肠梗阻
B.弥漫性腹膜炎
C.大量出汗
D.大面积烧伤
E.吞咽困难