问题 单项选择题 A3/A4型题

某大学学生发生不明原因集体腹泻,为了寻找病因及流行的线索。

通过第一步的研究,结果提示大批学生的腹泻可能与吃学校食堂饭菜有关,下一步最好采取()

A.病例对照研究

B.队列研究

C.现况调查研究

D.理论流行病学研究

E.临床试验研究

答案

参考答案:A

解析:腹泻疾病的产生可能与吃学校食堂饭菜这个暴露因素有关,调查它们之间的关系,最好采取病例对照研究,故选A

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Christmas Eve was tomorrow. I hoped one of the packages that held a camera had already been placed under the Christmas tree. It was the only thing I wanted. I had been dropping hints to my parents. I love taking photos. My bedroom walls are covered with photos I had taken with my mom’s old camera. I’m always trying to capture (捕捉) those perfect moments in which you can hear the laughter or touch the beautiful scene, but my camera has always seemed to fall short.

I knew Mom had put a few presents under the tree this morning, so I went on a hunt in my mom’s room. I opened the door and found my Christmas present was lying unwrapped on the floor — a big pink cat. I felt so disappointed.

Mom seemed to notice that, and she tried to cheer me up. “Stacy, I got your present today. I am so excited to surprise you!” “I can’t wait,” I said.

The next day I couldn’t wait any longer. I needed to tell her.

“Mom, may I talk to you for a second?”

“Sure, dear. What do you need to talk about?” she asked.

And so it came — how upset I was that I was getting a cat.

“Stacy, that cat is for your sister Julia!” she said with a smile.

“Then what am I getting?” I asked.

She just smiled. “You’ll have to wait and see.”

Next morning, I happily got into the living room and sat next to the tree. I pulled out the box with my name on it and opened the wrapping paper to find ...

My camera! “Thank you!” I said to both Dad and Mom.

Dad picked up the camera and took a picture of Julia, Mom and me. It has become one of my favorite pictures. Just on that Christmas morning, I took lots of photos with my camera — my little sister making a face, my parents giving me a soft smile — and all of these photos have come to mean one thing to me: love.

小题1:The underlined phrase “dropping hints” in Para-graph 1 means _____.

A.talking often

B.suggesting indirectly

C.sending presents

D.taking pictures小题2:Why did Stacy feel disappointed at first?

A.Her mother couldn’t understand her at all.

B.Her mother didn’t buy her any Christmas gift.

C.She mistook her sister’s Christmas gift for hers.

D.She didn’t find her present in her mom’s room.小题3:We can learn from the passage that _____.

A.her mother bought Stacy a camera after discovering her disappointment

B.her mother knew what gift Stacy wanted for Christmas

C.Stacy thought it’s OK to have an old camera

D.Stacy finally got her gift on Christmas Eve小题4:What is the last paragraph mainly about?

A.The family happiness captured by the camera.

B.The nice Christmas that Stacy spent.

C.The beautiful pictures that Stacy took.

D.The true love that Stacy got from her parents.小题5:What would be the best title for the passage?

A.A Christmas gift as wished

B.Love is more important than gifts

C.A wonderful Christmas

D.Love can not be bought

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