问题
单项选择题
侧隙，即活塞环在活塞环槽内的上下方的间隙，边隙较小一般不超过（）mm。
A、0.1
B、0.15
C、0.20
D、0.25
答案
参考答案：A
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侧隙，即活塞环在活塞环槽内的上下方的间隙，边隙较小一般不超过（）mm。
A、0.1
B、0.15
C、0.20
D、0.25
参考答案：A
| 阅读，判断正(T)误(F)。 | |
Every day John says to it, " Hello! I can see you! " Soon the bird can say " Hello! I can see you! " too. One day, John is at school. A thief (贼) comes into John's room. He wants to steal (偷) something. A voice(声音) comes, " Hello, I can see you! " The thief puts the things on the floor and runs away. ( ) 1. John is a policeman. ( ) 2. John has some birds. ( ) 3. The thief wants to take something away from the room. ( ) 4. The bird can say some Chinese. ( ) 5. The thief sees John and goes away. |