根管治疗中器械落入口腔中应立即首先采取的措施是
A.使患者不能闭口头部前倾
B.使患者闭口不动
C.使患者屏住呼吸
D.嘱患者不吞咽
E.嘱患者安静平卧
参考答案:A
_____________ that I couldn’t be absorbed in the work.
A.They made so many noise
B.So loudly they talked
C.It was so noise outside
D.Such a loud noise did they make
给半壶水加热,其温度与时间的关系图线为如图中的(a)所示,在其它条件不变时,如果是给一壶水加热,那么,温度与时间的关系将是图中的______图线(选填:b;c;d).作出这种选择的理由是:______.