采用吹洗法隔离时,吹洗用的介质应符合()。
A.清洁干净、不污染被测物质
B.可定时供给
C.吹洗压力略高于被测介质工作压力
D.吹洗可保证提供瞬间大流量
参考答案:A
Of course, we must work hard.________, we should learn to take good care of ourselves. [ ]
A. Therefore
B. In a word
C. As a result
D. Meanwhile
铁口深度正常时,打泥量要()。