氧气雾化吸入,正确的操作是()
A.不用湿化瓶
B.药液稀释成10ml
C.氧流量需6~10L/min
D.嘱病人呼气时按住出气口
E.嘱病人吸气时松开出气口
参考答案:A,C
六年级人数是80人,比五年级多2%,单位“1”是______,六年级是五年级的______%.
Which phase of the software development requires the most development time
A.the design phase
B.the testing phase
C.the maintenance phase
D.the development phase