一个公路收费站规定的车辆过路费标准如下：5月22号这天，过这个_爱下问搜题

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问题解答题

一个公路收费站规定的车辆过路费标准如下：5月22号这天，过这个收费站的小型车和中型车的数量比是5：3，中型车和大型车的数量比是5：4，这天共收过路费3640元．过这个收费站的三种车各是多少辆？

小型车	5元/辆．次
中型车	10元/辆．次
大型车	15元/辆．次

答案

因为5：3=25：15，5：4=15：12，

所以小型车、中型车和大型车的数量比是25：15：12，

可设小型车、中型车和大型车的数量分别为25x、15x和12x，则可得方程：

5×25x+10×15x+15×12x=3640，

455x=3640，

x=8，

则：25x=200，

15x=120，

12x=96；

答：过这个收费站的小型车、中型车和大型车的数量分别为200辆、120辆和96辆．

完形填空

My mom only had one eye. I hated her. She was such an   _. My mom ran a small shop at a flea market（跳蚤市场）. She collected little weeds and such to sell anything for the  we needed, she was such an embarrassment. I remember that it was field day(户外活动日) during elementary school, and my mom came. I was so   . How could she do this to me? I threw her a    look and ran out. The next day at school, “Your mom only has one eye?" they   me.
I wished that my mom would just    from this world so I said to my mom, "Mom, why don't you have the other eye?! You're only going to make me a laughingstock(笑柄). Why don't you just die?" My mom did not    . I guess I felt a little bad, but at the same time, it felt    to think that I had said what I'd wanted to say all this time.
Maybe it was because my mom hadn't    me, but I didn't think that I had hurt her feelings very badly.
That night I woke up, and went to the kitchen to get a glass of water. My mom was    there, so    , as if she was afraid that she might wake me. I took a look at her, and then turned    . Because of the thing I had said to her earlier, there was something pinching （夹痛）at me in the corner of my   . Even so, I hated my mother who was crying out of her one eye. So I told myself that I would grow up and become    , because I hated my one-eyed mom and our    poverty.
Then I studied really hard. I left my mother and came to Seoul and studied, and got admitted to the Seoul University with all the    I had. Then, I got married. I bought a house of my own. Then I had kids, too. Now I'm living happily as a successful man. I like it here because it's a place that doesn't    me of my mom.
This    was getting bigger and bigger, when someone    came to see me. "What? Who's this?" It was my mother still with her one eye. It felt as if the whole sky was falling apart on me. My little daughter ran away,    of my mom's eye.

C．embarrassment

B．embarrassed

B．disappointed

B．considerate

A．indepedence

填空题

对于多级透平，由于每一级的焓降不大，进、出口压力相差也不是很大，于是可采用________喷嘴，它不仅构造简单，加工方便，并且在变工况时，速度系数变化较________喷嘴要缓和，变工况性能________。此外，由于气流速度不高，因此，在喷嘴、动叶栅中的流动损失________。