排出人体产生的代谢废物和多余水分的系统是（） A．消化系统 B．泌尿系统 C．循

When my father was celebrating a milestone (里程碑) birthday, I pulled together a surprise gift that he would never forget.

As he was approaching 60,1 had a firm idea: What if I could get the memories people had of him, put each one into an envelope - 60 in total - and have him open them, one by one, on his birthday? So I wrote an e-mail to family and friends, explaining my idea.

I sent the e-mail and waited. And then the replies started coming in and I was very, very surprised. There were so many memories, and they were all so lovely. They came from the '50s, '60s, '70s, from every decade（十年） between now and the day my dad was born. They came from my mother, my siblings, my grandma, my dad's friends from high school, his sister, my dad's first boss, a colleague at his first job, from people who hadn't seen my dad in 40 years, from people I myself hadn't even informed. They typed them and handwrote them. They mailed them and e-mailed them.

The night before Dad's birthday, my sister and 1 stayed up late, putting everything together with some

The next morning, after breakfast and presents and cake, we gave the pile of envelopes to him. "Just one more thing for you," we said.

It took him a long time to open them and read. Each one was a brief ticket to another time, a leap (跳跃) backward over years and decades. There was a lot of laughter and a few tears, too.

I was kind of sad when the project was over because it was great fun to collect these memories. It gave me a different picture of my dad.

小题1:When did the author give her father a surprise gift? (no more than 4 words)

小题2:Who sent the mails? (no more than 6 words)

小题3:Why did the author and her sister stay up late the night before their father's birthday? (no more than 9 words)

小题4:How did the author's father most probably feel when he read (he mails? (no more than 3 words)

小题5:What was the surprise gift? (no more than 6 words)

消化性溃疡的发生与何种病原菌感染有关（）

A.链球菌

B.肺炎球菌

C.幽门螺杆菌

D.金黄色葡萄球菌

E.大肠埃希菌

折射仪测试定期校准常用标准宝石是（）

A.尖晶石

B.水晶

C.碧玺

企业有哪些资源，为什么说领导人的精力也是资源？