影响汽轮机经济性的主要指标有哪些？

I found out one time that doing a favor (关心)for someone could get you into a lot of trouble. I was in the eighth grade at the time, and we were having a final test. During the test, the girl sitting next to me whispered something, but I didn’t understand. So I leaned(倾斜)over her way and found out that she was trying to ask me if I had an extra pen. She showed me that hers was out of ink and would not write. I happened to have an extra one, so I took it out of my pocket and put it on her desk.

Later, after the test papers had been turned in, the teacher asked me to stay in the room when all the other students were dismissed. As soon as we were alone she began to talk to me about what it meant to grow up; she talked about how important it was to stand on your own two feet and be responsible for your own acts. For a long time, she talked about honesty and emphasized（强调）the fact that when people do something dishonest, they are really cheating themselves. She made me promise that I would think seriously about all the things she had said, and then she told me I could leave. I walked out of the room wondering why she had chosen to talk to me about all those things.

Later on, I found out that she thought I had cheated on the test. When she saw me lean over to talk to the girl next to me, it looked as if I was copying answers from the girl’s test paper. I tried to explain about the pen, but all she could say was it seemed very strange to her that I hadn’t talked of anything about the pen the day she talked to me right after the test. Even if I tried to explain that I was just doing the girl a favor by letting her use my pen, I am sure she continued to believe that I had cheated on the test.

小题1:The story took place exactly          .

A．in the teacher’s office

B．in an exam room

C．in the school library

D．in the language lab小题2:The thing(s) emphasized in the teacher’s talk was (were)          .

A．honesty

B．sense of duty

C．seriousness

D．all of the above小题3:The boy knew everything          .

A．the moment he was asked to stay behind

B．when the teacher started talking about honesty

C．only some time later

D．when he was walking out of the room

焦炉气中的粗苯必须经过蒸馏处理后才能使用。

元气大亏，阳气暴脱，亡阳与气脱并见，应选下列哪一对药物( )

A．附子、人参
B．附子、黄芪
C．附子、肉桂
D．附子、干姜
E．白术、附子

（12分）如图所示，质量为m =10kg的物体，在F=60N水平向右的拉力作用下，由静止开始运动。设物体与水平面之间的动摩擦因素µ=0.4，g=10m/s²求：

（1）物体所滑动受摩擦力为多大？（2）在拉力的作用下物体运动的加速度为多大？

黏膜支持式义齿（）

A.力通过卡环传导到基牙上

B.力通过基托传导到黏膜和牙槽骨上

C.力通过支托传导到黏膜和牙槽骨上

D.力通过基托传导到基牙上

E.力通过支托传导到基牙上