电源电压正常,测量极板组间隔电压差别较大,主要是电解池内太脏所致。
参考答案:对
Our school is very big. There are sixty classes in our school. There are about(大约) fifty students in a class. There is a television in a classroom, but there isn’t a computer. There are 52 desks in my classroom. In my class there are 26 boys and 25 girls.
Our library is big, too. There are many books in it. The gym is behind it, and the science labs are next to the library. Behind the gym is our dining hall. We have lunch(吃午饭)in it.
小题1: There are about ___________ students in a class in our school.
A.70
B.60
C.50
D.40小题2:There is no ________ in my classroom.
A.television
B.computer
C.blackboard
D.teacher’s desk小题3:In my class there are _________ students.
A.52
B.26
C.25
D.51小题4: _________ is in front of the gym.
A.The library
B.The science lab
C.The dining hall
D.The classroom小题5:We have lunch in the _________.
A.library
B.science lab
C.dining hall
D.classroom
下列关于经济分析与财务分析异同的描述中,正确的是( )。
A.两种分析的角度和基本出发点不同
B.两种分析的作用不同
C.两种分析使用价格体系不同
D.都使用效益与费用比较的理论方法
E.两者都遵循效益和费用识别的有无对比原则