流行病学研究的对象是（）。 A.病人 B.非病人 C.病原携带者 D.人群 E.个体

男性，30岁，从事驾驶员工作5年，近2年反复发作腰痛，放射到右足跟部，腰椎CT提示L盘突出，突向右后方，压迫神经根。

如保守治疗无效，最适合的手术方案为

A．椎板切除减压术
B．椎弓根内固定术
C．椎板切除加椎弓根内固定术
D．L₅～S₁右侧椎板开窗减压髓核摘除术
E．L₅～S₁全椎板切除哈氏棒内固定

阅读理解

     "What are you doing asleep on a park bench in the middle of the day naked?"

     "Well, you see, officer, it all started this morning. I woke up to the sound of the big master's alarm

clock and jumped off my doggy bed. I wandered down into the kitchen and sat down to wait for

breakfast."

     " Hang on! What do you mean by doggy bed?"

     "Well, I am actually a dog. Let me finish my explanation. Anyway, when the big master came

downstairs I could tell that it would be a busy day, because he was rushing around. He fed me quickly

and ran out of the door, not even bothering to get some breakfast for himself. This was fairly normal-he

hardly ate in the morning. "

     I finished my breakfast soon, and then I went upstairs to wake up the little master. After that, I had to

wake up the big mistress. Because I knew how much she hates it , I cautiously walked into the big room

and tried to wake her up gently. Unfortunately, as soon as my nose touched her side, she jumped straight

up and yelled at me to get out of her room. I did that straight away. I headed downstairs again. The little

master was already downstairs. After eating breakfast, he ran out. I followed him as usual and made sure

he got to school safely.

     On my way home, a van stopped beside me. Then I was stuck in a net and thrown into the van. I

started struggling and barking. Immediately I was given a needle and calmed down. When I woke up, I

was lying on a bed. Looking around, I realized I was in a science lab. Strangely, I found I wasn't a dog

anymore! I was human! I started yelling for help and an old man walked in. On seeing me, he shouted

excitedly, 'It worked! It worked!' Then I was given another needle. The next thing I remember is that

you woke me up. So that's why I ended up asleep here naked."

     "Very funny son, now come with me. By the way, what's your name?"

1. From what the man said we know that ________.

A. his big mistress seldom had breakfast

B. there were at least two bedrooms upstairs

C. he waited till his little master returned home

D. he woke up all his masters with his nose

2. What does the underlined word "it" in the fifth paragraph refer to?

A. Being woken up.

B. The dog entering the room.

C. Preparing breakfast.

D. The sound of the alarm clock.

3. What does the officer think of the man's explanation?

A. Funny and believable.

B. Reasonable and acceptable.

C. Unbelievable but interesting.

D. Imaginary but out of date.

4. What most probably will the officer do next?

A. Help the man find his big master.

B. Pursue the old man immediately.

C. Take the man to the police station.

D. Warn dog owners to look after their dogs.  

有一死亡的弃婴，法医为了判断其是产前死亡还是产后死亡，方法之一是将死婴的肺剪下一块投入水中，你认为判断是产后死亡的依据是[ ]

A．肺能有节律地收缩    

B．不规则跳动  

C．沉入水底            

D．浮于水面

以下对“客户需撤销预约的礼品“的操作要求描述正确的是（）

A.可在预约当天日终之前通过柜面进行

B.可在预约当天日终之前通过短信方式进行

C.可在预约次日通过柜面进行

D.可在预约次日通过短信方式进行