What does his father want _________?[ ]
A. know
B. to know
C. knows
D. knowing
答案:B
循环小数一定都比1大.______.
骨关节炎患者服阿司匹林后出现黑便,应首先考虑()
A.食管静脉曲张破裂出血
B.反流性食管炎出血
C.十二指肠溃疡出血
D.胃癌出血
E.急性胃黏膜损伤出血