They want to the zoo.
A:visit
B:visiting
C:visited
— I don't think he has a chance.
某同学用pH试纸测定未知溶液的pH时,他先用蒸馏水将pH试纸湿润,然后再测定,则他所测得的未知溶液pH将( )
下列格式计算正确的是( )