使糖、苷和多元醇中有邻二羟基结构者呈蓝底白斑的是( ) A．苯胺-邻苯二甲酸盐试剂

患者因上前牙充填体脱落就诊，洞深达牙本质深层，一次完成充填治疗。充填后感冷热刺激痛，不敢咀嚼食物，1周后再次就诊。查：充填体，叩（-），无松动，冷热刺激明显疼痛，刺激去除后1～2秒疼痛消失，该患牙1周前处理中的问题最可能是（）

A.充填材料选择不当

B.诊断失误

C.充填时未垫底

D.洞形制备不当

E.腐质未去尽

临床上常见的牛腹壁疝是由于（）通过腹腱膜进入皮下形成的.

A.小肠

B.系膜

C.膀胱

D.瘤胃

E以上都是

On Sunday while I was having my own Father’s Day celebration, I thought about my dad a lot. By the time I called to tell him that I loved him, he had already gone to bed. So I wrote the following to show what my dad means to me.

About 28 years ago, my dad was a used car salesman. Every Thursday night, he would head off to Shreveport, LA for the auction（拍卖会）. Most of the time, I drove a car over there for him so he could sell it there.

One day, I was riding with my dad to Shreveport for the auction when he found a hitchhiker（搭车者）with a backpack. As soon as dad saw him, he pulled the car over and offered him a ride. Dad asked him his name and continued to talk to him about all sorts of things. I can’t recall why but he told dad a lot of terrible things that had occurred to him. I sat in the back seat and watched the scene with amazement. I could see that the hitchhiker changed his attitude as he could tell someone who was really listening to him.

We drove another forty-five minutes before we had to exit the interstate（州际公路）. We pulled over and dad told him to keep his head up and things would start looking up for him soon. He reached into his pocket and handed the hitchhiker a twenty-dollar bill and then a the-dollar bill.

We drove on and my dad did not say a single thing. I was still completely amazed by what I just witnessed. I was always told everyone to never pick up a hitchhiker and yet my dad did it every single time he saw one. I’m sure that it made that poor man’s day, probably a month to follow.

While reflecting upon that story, I learned a lot about my dad and life. I learned that if you come from a place of service or compassion, you can change people’s lives. Just one single kind act can change someone’s life. It never occurred to my dad about not stopping to help him.

This is the type of person my dad is. Thank you for setting such high standards for me to follow.

Dad, I love you. Happy Father’s Day!

小题1:The author and his dad met a hitchhiker（搭车者）_______.

A．when they were just warned not to pick up a stranger

B．on their way to Shreveport to sell a car

C．on their way to the west for a trip

D．when their car was running out of gas小题2:What do we learn about the hitchhiker from the passage?

A．Something unpleasant occurred to him.

B．He was going to the auction.

C．At first he didn’t believe in the author.

D．It was he who bought the author’s car.小题3:How did the author feel about his dad’s behavior at that time?

A．Angry

B．Appreciated

C．Surprised

D．Ashamed小题4:What did the author learn from his father?

A．Just a single kind act can make a difference.

B．Try learning to be a good listener.

C．Set high standards for yourself in life.

D．Offering a ride to a stranger is dangerous.

对于已签发检验检疫单证的出境货物，改换包装或重新拼装后不必重新报检。 ( )

发生水冲击的原因有哪些？