眼膏剂的质量检查项目不包括
A.熔点
B.金属性异物
C.粒度
D.微生物限度
参考答案:A
Look! The ground is wet. It must have rained last night, ________?
A.hasn't it
B.hadn't it
C.mustn't it
D.didn't it
为防止电解液溢出,蓄电池加液盖上的孔应该密封。