测得某样品的余氯为1.0mg/L,准确测定其pH的方法是()
A.pH试纸法
B.比色法
C.滴定法
D.重量法
E.电位计法
参考答案:E
A.,正电荷
B.,正电荷
C.,负电荷
D.,负电荷
After he lost his job, he ________ debt but eventually paid it off.[ ]
A. went into
B. got into
C. ran into
D. tried out