一般情况下气马达正常使用()后,应拆开检查,清洗一次。
A、1个月
B、3个月
C、3-6个月
D、6个月以上
参考答案:C
Two frogs lived in a small village. One day they _小题1:_ to see what the big city was like. The city was about ten miles __小题2:__. It was a hot day, and they soon began to ___小题3:___ tired. They had only gone a little way when the big one said to the small one. “We are so tired. Is the city __小题4:__ very far? Can you see it?”
“No,” said the small frog, “but __小题5:__ I get on your back, I can see it.” Then he ___小题6:__ up on the back of the big one.
__小题7:_ the small frog put up his head, he couldn’t see very far. He could only see their village.
“Can you see the city?” asked the big frog.
“Yes, I can see it. It looks just ___小题8: our village,” answered the small frog.
Then the frogs thought that they didn’t __小题9:_ to go any farther. They went back, and told the other frogs in their village that they saw the big city and it was just like __小题10:__.
需要层次理论基于()的逻辑,ERG理论不仅基于这种逻辑,还包括()
A.受挫-倒退;满足-前进
B.满足-前进;受挫-倒退
C.需要优先;愿望加强
D.愿望加强;需要优先