甲硝唑治疗阿米巴病的主要机制为()
A.清除隐伏的带包囊状态
B.杀灭繁殖滋养体
C.可控制原虫对肠壁的损伤
D.可阻止症状进展
E.可控制肠内外并发症
参考答案:B
—We haven't heard from Jane for a long time.
—What do you suppose ______to her? [ ]
A. was happening
B. to happen
C. has happened
D. having happened
研磨工作中,对钳工而言,经常采用的是()研磨。
A.机械
B.机动
C.手工
D.自动