比较价格差异时,使用的数量指标是实际的,比较数量差异时,使用的价格指标是计划的。
参考答案:对
阅读短文,选择正确答案。
Mr. Ma is our Maths teacher. His class is very interesting. We can learn a lot from his class. We like him
very much. He often helps us make things. We can do many different (不同的) things. Some of us can make
model (模型) planes. Some can make model boats. Others (其他) can make robots.
Look at the robot! We like it very much, because it can do many things for us. It can clean the windows
and clean the rooms. It can help us remember (记住) things.
Mr. Ma has two boys. Their names are Ma Shan and Ma Yang. They are at home with their mother.
1. Mr. Ma teaches us . [ ]
A. Chinese
B. English
C. music
D. Maths
2. is very interesting.[ ]
A. Model planes
B. Model boats
C. His class
D. Robots
3. Ma Shan and Ma Yang are Mr. Ma's .[ ]
A. students
B. girls
C. friends
D. sons
4. The robot can . [ ]
A. clean the windows
B. clean the rooms
C. help us remember things
D. A, B and C
5. doesn't go to work.[ ]
A. Mr. Ma's wife
B. Ma Shan
C. The robot
D. Mr. Ma
图例描述的是()。
A.通风口
B.回风口
C.排气扇
D.楼梯间