胸水、腹水等标本含菌量通常较少,为提高阳性检出率不可采用如下哪种方式处理()
A.溶解
B.离心
C.过滤浓缩
D.采集较大量标本
E.37℃保藏24小时后接种培养
参考答案:E
根据首字母及汉语提示,完成下列单词的拼写,使句意明确,语言通顺。
小题1:Sorry, I can’t follow you. Would you please speak more (缓慢地)?
小题2:Bob was very careless. He made so many (错误) that he failed the exam.
小题3:Reading English aloud every day will of course help you to improve your (发音).
小题4:I had no chance to r (回答) to his question.
小题5:Tony is always friendly and h (有帮助的) to others.
根据下列信息,写出有关的化学方程式:
(1)在空气中点燃锌粉时,锌粉燃烧.
(2)铝跟硫在加热的条件下反应.
(3)汞蒸汽有毒,为防止汞蒸气使人中毒,可以在洒落的液态汞上覆盖硫粉,产物是+2价汞的硫化物.
(4)铜器在潮湿的空气中,表面会慢慢生成铜绿.