以下缩写是指:ODS().
A.气相色谱法
B.高效液相色谱法
C.十八烷基硅烷键合硅胶
D.红外分光光度法
E.差示扫描量热法
参考答案:C
When I got to the checkout counter, I realized I didn't have enough money, so I kept _____ I really needed
and left the rest. [ ]
A. what
B. which
C. that
D. this
关于胸膜腔闭式引流装置,下歹lJ哪项是正确的()
A.水封瓶长玻管在水下3~4Cm,水封瓶低引流口60Cm
B.水封瓶长玻管在水下3~4Cm,水封瓶低引流口40Cm
C.水封瓶长玻管在水下4~6Cm,水封瓶低引流口30Cm
D.水封瓶长玻管在水下4~6Cm,水封瓶低引流口60Cm
E.水封瓶长玻管在水下2~3Cm,水封瓶低引流口50Cm