D的分解反应为一级反应,反应在t℃下D的浓度由cD,0变为2cD,0/3需时3分钟,若继续再反应3分钟,则此时D的浓度应为( )。
A.D,0 (B)2cD,
参考答案:C
The hospital ______ well, where many wounded ______ every day.[ ]
A. is operated, operation
B. operates, are operated on
C. operates; are operated
D. operates; operates on
20.08平方分米=______平方厘米
628mL=______L.