计算：（1）8+（-14）-5-（-0.25）；（2）-22×7-（-3）×6+

I shook hands with my father in the truck, and for a long time he looked straight ahead and didn’t say a word. But I knew he was going to say a little to me. “I can’t tell     ,” he finally said. “I never went to college, andnone of your      went to college. I can’t say don’t do this and do that,      everything is different. And I don’t know      is going to come up. I can’t help much with money,     , but I think things will work out. ”

He gave me a new check-book(支票簿). “If you are short of money,      a small check. But when you write one, send me a letter and let me     how much. There are some things we can always sell.” In four years all the checks I wrote were less than a thousand dollars. My part-time jobs such as      to the blind student and sitting with the teachers’ kids filled in the financial gaps.

“You know what you want to be, and they’ll tell you what to take,” my father went on. “When you get a job, be sure it’s honest, and work hard.”

Then my dad reached down beside his seat and brought the old,      Bible that he had read so often. He didn’t say read this every morning. He just said, “This can help you if you will let it.”

Did it help? I got through college      being a burden on the family. I have been able to make money since.

故障抢修采取降弓运行时，降弓运行时间原则上不超过（）小时。

A、12

B、8

C、24

固定桥设计是否合理，其中最为重要之点是（）

A.基牙牙冠具有足够的长度和体积

B.固位体固位形式与种类选择得当

C.基牙牙周组织健康

D.借助于机械力学原理

E.基牙负重力不超过其牙周组织的最大承受力

对于非圆形管，（）等于四倍的流通截面积除以润湿周边。

A.摩擦直径；

B.弯曲直径；

C.当量直径；

D.公称直径。

地层流体侵入原因有哪些？