急性腹膜炎的主要体征是
A.腹部压痛
B.肠鸣音亢进
C.腹膜刺激征
D.移动性浊音
E.腹肌紧张
参考答案:C
— Got your driving license?
— No. I ________ too busy to have enough practice, so I didn't take the driving test last week.[ ]
A. was
B. am
C. have been
D. had been
可能产生有害污染物的保藏方式是()。
A.辐照保藏法
B.微波杀菌法
C.高温灭菌法
D.发酵法
E.熏制法